>>Which problems did you have with the Ender apart from the mentioned classic 3D printing problems?

The kind of problems that could only be solved with a rather embarrasing amount of tuning every time I switched filament types or speeds or the temperature in my garage changed etc etc etc. Things that basically meant that every time I wanted to introduce any change I needed to print a new flow tower, new bridging tower, new temperature tower, the bed levelling took a huge amount of effort to install BL touch on it but it still worked....when it wanted to, with parts of the first layer being too close scraping the bed and others being far enough to not stick.

Don't get me wrong - the Ender 5 could print as well as the H2D can, absolutely. But it would need 10 test prints and me pulling my hair out first to get to the same level of quality - which I have done, repeatedly, but I just lost the appetite for the tinkering. With the H2D I click print and the machine calibrates itself so well I actually feel bad for anyone who only ever experienced this and never had to sit down calibrating extruder steps or flow rates manually. (yes, old man yelling at clouds).

>>and I don't send a single bit of information to the Creality mothership while doing so. The same is probably harder - but maybe not impossible, I haven't looked into this yet - with Bambu printers?

Bambu printers, even with the most recent firmware allow Home Assist integration where you can monitor all print parameters remotely. But to be completely honest with you - I did go through a phase where I cared about stuff like this, now I just want it to work and be more like my dishwasher than like my bike, I want to tinker with the bike but my 3D printer should "just" work.