I've been using Reaper for many years now, on rather light-weight hardware (Intel i5-2500 PC, Windows 10 Pro, 12 Gb ram...), and have stuffed it pretty full of orchestral instruments, or several (read 'many'...) Kontakt instances, up to 32 treated drum tracks and much more, and wouldn't use it if it crashed. If Reaper is crashing, maybe another DAW would, too..? Post your issues here, or on the Cockos 'Reaper' forum and get them aired, at least. Solutions may well be not far away...
Just sayin'; hope this helps.