I already do every day lol
this
stuffty specs here:
intel pentium 4 650 from ~2004
2 gb dual channel ddr2 @ 266mhz
dell 0hh807 motherboard
geforce 610 (probably the best thing in this computer lol)
500 gb (466gb after conversion from SI units) HDD
This runs blockland much better than you think (unless you tried supersoft shaders which only work for screenshots since they lag for like 2-3 seconds-obviously unplayable unless you used timescale .2/etc.; and obviously I wouldn't even try blockoseattle/any megabuild) Basically graphic wise it's OK.
Also, I can somewhat fly planes OK on flightgear even with 3D clouds and light scattering, pretty sure any real shaders kills the already low frame rate which is ~8 fps or so.