MK4S

You can sell it, there is probably some customer base with mk3 and mk4 that may consider it for right price. I believe for various reasons enclosure for mk4 was really dead end. The Biggest issue is to volume you have to heat up, location of the printed part on the bottom due to printer construction

About 6-8 years ago, I worked for a print farm running MK3s, and I built 4 or 5 of them for them in that time. Because even though Prusa was offering fully assembled printers, I made a decent wage assembling them and still came out less expensive building the kits. It was also an excellent education

Doing the maths over here... with the current black friday deal as a comparison; https://www.prusa3d.com/product/original-prusa-mk4s-3d-printer-kit/ You would have to be a complete fuckhead to buy from Amazon...? Right? Am I missing something...

I've had a Core One upgraded from MK4s for 4 months. The only problems from your list I've experienced are the gantry squaring, and prior to the fixes Prusa made there were minor VFAs in some prints, now gone. There's definitely an assembly problem if your nextruder main plate wore out in 2 months.

As a XL owner, im sad that they did not release a XL+ performance upgrade to fix issues and improve performance. Also I'm a little disappointed that it's so hard to track subtle improvements as there is no obvious revision list. I have tried to track the printable repository for printed parts and up

The two big pro for me are: That Prusa is open source firmware so you aren't beholden to the whims of the company. Bambu tried to lock down their firmware a few months ago but had to partially backtrack due to community outrage. Still it broke integration with third party slicers iirc. Prusa sells u

I have a Prusa MK2 that I can turn on and print like new, if I wanted. It has 28k hours and I've only replaced belts once, and fans due to bearings wearing out. I have three MK3s with more than 15k hours each, one near 20k. Again, only a few fans, one extruder because of my own dumb mistake. My MK4S

Upgrade to Mk4S https://www.prusa3d.com/product/original-prusa-i3-mk3-s-to-mk4s-upgrade-kit-2/

You summarize why I went with a Bambu printer and not a Prusa. I need a bigger printer. If Prusa had released their L sooner instead of the Core one, maybe I would have took that route. But then, with what Bambu is offering, and even Qidi, I don't feel like Prusa is there anymore. For absolute fabs,

I use the auto rewinder adapter for (un)original Prusa drybox and I find it totally reliable. It also fits on top of my Lack enclosure. OP, imho, this decision comes down to $$ and time. If I needed another printer now, is probably go with another MK4S w/mmu3 if only for the convenience of having mu