Hi Mathias,
You are right, the version of jQuery shipped with the platform is an older release and updating it is a good idea.
The team is currently working on a bolder plan so that in the future you don't need jQuery at all, and that you can create applications that react very fast to user input only using low-code (you'll hear more about it soon).
Changing jQuery for the existing apps is not a completely trivial change, and it might have impact, but I'll leave this issue as "On our radar" and we'll keep an eye on it, so we can address it in the future.
Cheers,
Tiago Simões