Recently, however, I bought a Bambu Labs X-1 Carbon, and it is amazing!
That's a seriously good printer, Bambu Labs are on my wish list for the day my Creality finally gives up the ghost or becomes not worth the cost of maintenance.
I think I'd agree on the development rate of printers. I only became interested 2-3 years ago when a couple of archery friends were talking about them at a club night. Even then I was surprised how much they'd dropped in price and increased print quality compared with a few years previously. I quizzed them about the market with a "I don't want something to tinker with or perpetually upgrade, just something that works out of the box" view and bought the CR6SE on their recommendations. At the time it was the best bang/buck for someone wanting a toy to play with.
I've since done a lot with PLA+, had some good prints with TPU and PETG but I think that's about the limit. So far I've changed the drive & bowden tubes after the OEM stuff cracked and replaced the hot end section (again) so a few months ago I started looking at the market for something which will be a bit faster. Even over 2-3yrs we've seen some great improvements and Bambu Labs seem to be the new kids on the block with good machines.
You mentioned PETG-CF, what are you making with this stuff ? Just curious......