I'd say both. IIRC the DOS story was better under OS/2 than NT, but the RAM requirements were higher (at least until XP).
To add a third prong: hardware support was a big issue too as it is for any consumer OS, with legacy hardware being an issue just as it can be today if not more so. This hit both NT and OS/2 similarly.
To add a third prong: hardware support was a big issue too as it is for any consumer OS, with legacy hardware being an issue just as it can be today if not more so. This hit both NT and OS/2 similarly.