There are, and I think the only real difference has been the community support. The community was behind the original pi and the guides, images and support show that, and it continues to this day.
If this becomes "enshittified" then communities will grow around the alternatives, it's likely there will be an overall winner (or winners per class) and we'll move on. The device itself wasn't ever the whole story.
That's going to be a fun way to learn pod tolerances and affinities. Although... it's also a great way to play around with multiarch clusters without accidentally burning a hole in your wallet from AWS/GCP usage.
If you were able to buy one at the beginning of the pandemic it was great. If you weren’t, then the 4 was annoying as fuck because it was impossible to purchase at anything less than 3X MSRP.
I think a bunch of others gained some footing in the market when Raspberry Pi had supply chain issues during/after COVID. When I last shopped for a Pi, I saw a ton of other options.