Prusa may still be king if you're using printers commercially, running them hard 24/7 in a print farm, wanting to be sure your investment has a decent lifespan with readily-available spare parts and upgrade options.

But it's a premium brand now. For lighter use by hobbyists, Bambu is the clear winner on price/performance. The 'less open' downside is not a factor to most people, and the printers generally work so well out-of-the-box that repairability isn't as much of a concern as it was on printers of the past.

Personally I went from a Prusa MK3s to a Bambu P1P (after looking long+hard at Prusa options), and so far, no regrets. (Although I've kept the old Prusa as a 2nd printer and upgraded it to a MK3.5, but mostly just because I do enjoy a bit of tinkering with them)