I bought a 2019 Touring L with 236/60 18's and it just has a Repair kit and air pump.
That might work for small percentage of flats, but it concerns me it still might strand me on any length of trip.
I looked into many ways to provide myself more peace of mind.
The original spare is expensive (about $600.00) and lose some storage. It also is not a fix for the semi long term.
So $600.00 to save a bit of space and only 50 MPH (maybe) does not seem the best overall if outside a City during the workday.
My Idea is to buy a Chrysler 17" rim it's about $80.00 a decent new 225/60 17 tire $70.00, .. total weight about 52 lbs and a very similar size overall and safe (ask any expert). But it will also save you over 2% in size in Diameter and circumference (almost 2 inches), and over 5% in width. The combination of less weight and smaller size is important since it will need to be stored in the van.
With this set up you could drive on indefinitely until a repair or replacement could be made.
One never knows if you have a serious blow out and or rim totaled this system could work in case you cannot find a replacement rim and or tire in the sort term.
If all you have is the inflatable spare and a rim goes one could be stranded for some time.
Anybody have insights, comments or questions?
I share your concern about relying on the tire sealant and inflator to get me going after a flat. The sealant will not fix some punctures and there are issues with fixing/replacing a tire after the sealant has been used. I have not had a flat in over 15 years but I still opted for the spare tire for my Pacifica (vacuum delete).
But I think you are over thinking the limitations of the compact spare.
FCA limits the compact spare to 50mph. You added "maybe" as if the speed might be less but, more likely, this speed is worse case conservative. Handling and braking will be affected by the smaller diameter and tread depth/design so I would take 50mph as the minimum "max speed". I expect the tire can be used at faster speeds under normal road conditions (not recommending this).
The diameter for the 225/60-17 you are considering as a spare (27.6") is the same as the 165/80-17 compact spare when inflated (27.4"). I assume that some of the speed restriction for the compact spare is attributable to the handling effects of having one tire 1.7" smaller in diameter than the other 3. You wrote the 225/60-17 is "similar in size and safe (ask any expert)" but any tire shop will warn against running with different tire sizes on the same axle and caution against running with tires that have different tread patterns. Driving with the 225/60-17 spare can be done safely but you will need to drive the van differently, including at slower speeds.
You are concerned that a catastrophic failure of both the tire and rim could require you to use the spare for an extended period of time, longer than the compact spare was designed for, while waiting for a replacement OEM setup. A flat tire is an unlikely occurrence. A flat with an unusable rim is even more unlikely. Consider that an impact sufficient to take out both the tire and rim likely will create a misalignment issue or cause damage to suspension parts that must be fixed. These could keep your van off the road or at least limit its driveability.
With regards to getting a replacement rim/tire in the short term if you experience the unlikely, worse case catastrophic failure; if close to home you likely can make do with the compact spare for a few days if your daily trips are short or you may have alternate transportation solutions. The problem gets more difficult on a long trip away from home but there are options including ordering a suitable tire/rim combination from an on-line seller like Tire Rack and having it shipped to an installer in the place you are visiting or one you will visit down the road. Sure, this may come at a premium cost and cause delays but may be acceptable strategy for an unlikely event.
Where are you going to store the 225/60-17 spare in the van? Seems like it will always be in the way and you may need to remove it if the cargo space is needed for something else. You wrote that you chose the 225/60-17 to get the size down over the original 235/60-18 but the size reduction is not very much. Only 14% less volume. The collapsed compact spare provides a 66% reduction in volume over the original tire. This is significant.
Finally, as mentioned in another post, the compact spare kit is closer to $300, not $600, and I think that includes the jack.
Ultimately you must make the decision that you are comfortable with and meets your driving needs.