In 2017 I bought a $300 delta printer, and it was a frustrating experience. I spent more time configuring and tuning it, than printing.
In 2019 I bought a Prusa MK3 and it was like a whole new world. It ‘just worked’. I felt comfortable that a 98 hour print would complete successfully. The main technology improvements of the Prusa over my previous printer was the auto-bed leveling and the magnetic print bed. With the Prusa I could focus on my designs, not on trying to get my print bed level, or prying parts off a glass build plate.
It took Prusa another 2 years to get the MMU2 out. I and many others struggled with it. Reliably forming the filament tips on retraction is a hard problem to solve. I used the MMU2 for switching spools when one ran out, but using it for a multi-color print that needed more than 100 filament switches just didn’t work reliably. I was never able to complete a long multi-color print without the printer stopping several times due to filament jams or other issues.
Two years ago I got a P1S Combo and haven’t looked back. It “just works”, but now I can say that about multicolor prints as well. The main technology improvements of the Bambu over the Prusa for me were the speed and the AMS. Speed was nice, but as far as I’m concerned, the AMS was the real innovation. Not only could it reliably complete multi-color day long print jobs, but I use it as a filament pool. With the integration of the printer interface into Bambu Studio, the only physical interaction that I have with my P1S is to lift jobs off the print bed, and occasionally add a fresh spool of filament. With the Prusa there were always 3 interactions per print job; loading the filament and unloading the print bed and the filament. And the dry box feature of the AMS lets me feel comfortable about leaving filament in it for weeks, and just picking an available color when I want to print something.
The Core One is a good step for Prusa, but they have yet to deal with the filament management issue. I have an XL and I like it. It may be slower than the P1S for single color prints, but it is much faster for multi-color; at under 10 seconds per color switch, no poop, and a minimal purge tower. But it is still 2019 technology relative to filament management. I need to manually load and unload 5 print heads for multi-color prints. This is a lot of babysitting when I’d much rather be doing other things. Bambu has proved that good filament management technology exists, but Prusa hasn’t appeared to pick up on this yet.
When I finally sold my MK3S I had over 13,000 hours on it, and I felt comfortable selling it because it was still reliable and generating great prints. I put a deposit down on the XL the day after it was announced, but it was over 2 years before it was finally delivered. So far it has proved to be just as reliable as my old MK3. I am still a Prusa fan, but I feel that Bambu has really raised the bar for what one can expect from a modern consumer 3D printer.
Being more interested in printing, than printers, I don’t really care about whether something is open sourced or not. I just want a reliable printer. And ceasing to support the P1S in 2028 is sort of concerning, but given the rate of innovation in the 3D printing industry, I will probably have moved on by then.