we all know that 2D printers are not able to indefinitely work "easily without issue", they all have issues that crop up at some point or another. 3D printers

we all know that 2D printers are not able to indefinitely work "easily without issue", they all have issues that crop up at some point or another. 3D printers are the same. it's a mechanical thing which involves heat and lubrication and motors. It's never going to be "without issue". 3D Printers are a lot better than they used to be though - if you buy a good one it will be immediately useful and require minimal maintenance. Those are the things Prusa is good at.