Hey all,
sometimes I think one of these machines that have a Z axis and an additional W axis, both in vertical direction, have advantages:
– Source: Kief, Hans B., Roschiwal, Helmut A., and Schwarz, Karsten: CNC-Handbuch, 31., überarbeitete Auflage 2020, Carl Hanser Verlag, München
That would make your questions superfluous, since you would simply lower the X axis using the W axis sometimes 
I think into this direction because I have seen more than one project of CNCs built by users from scratch lastly, and it’s nice that there are suppliers where you can get nearly everything for this purpose.