Yes, but you said it yourself - you had to replace the firmware with one that lets you run faster than the original, and you're using a different slicer.
With Bambu Labs printers, you just plug them in, turn them on, and feed them filament and your files. They work so well that you don't have to think about firmware or anything else.
I got my first 3D printer around a dozen years ago as well, and the comparison to the experience you get with a Bambu Labs X1C or H2D is absolutely night and day. It feels like with the previous generations of 3D printers, that operating and maintaining and tuning the machine itself was the "hobby". With Bambu Labs (and I'm sure some of the other competing printers that have come out since the X1C was released), the "hobby" is what you actually make.
It just works, requires no tweaking, no fiddling, no flashing firmware or bed leveling or hairspray, and it has totally changed 3D printing from a nerd hobby to something anyone can do (IMHO).
