Not exactly. You can use any filament (analogous to the ink) and they have said they won't limit that. They have rfid tags in the filament but the printers without AMS don't even have the ability to read it.
Until they go back on that I don't really mind them. I don't want to use other slicers etc. I didn't buy this printer as a tinkering project but to print stuff and at that it really is very good.
I mean I really wish they were more open but I didn't buy this printer because I thought it was open. I bought it knowing it was not. I've had many printers over the years and I've always hated having to mod them to make them usable. I just want it to work out of the box and Bambu is the first one I've had that really delivered on that.
I'm not a fan and I'll move to other brands when I can (my latest printer is a snapmaker) but I think they do still offer good value for money.