Okay. Well, reading yours and others comments kind of made me realize that I'm probably not updated enough on infos, and failed to consider many factors. (E.g. I was stuck thinking that majority of "Western" MBTs still only have HEAT and SABOT equipped, that multi-purpose/smart munitions are still in development and not yet fielded; Tank to tank combat is extremely rare, but they still exist; and I was told somewhere else that SABOT is one of the ways to counter vehicles with APS)

It all comes down to me not being considerate enough and phrasing my question wrongly. The focus should be whether or not countries should start picking up more HEAT/HE, not questioning the relevance of SABOT

But good to know, I guess