The only real negatives I've seen regarding TYM's current lineup are dealer related, and really that's a potential issue with any brand. Frankly it's nice to see so much good being said about them, because a decade ago they didn't seem to hold this confidence; which I find a bit odd given TYM made Mahindra's have seemed quite well regarded for years now. The only reason I didn't give them a proper look is that I straight up don't trust the local dealer, and that's unfortunate.
Speaking of the aforementioned TYM made Mahindra's, TractorHouse always seems to have a number of them selling with a few thousand hours- and that, to me, speaks well of their potential longevity. It's interesting seeing the concerns regarding these Korean machines slowly work away as the time passes, much as they did for the Japanese imports two or three decades prior. It really mirrors the automobile industry in that regard as well, as does the disappearance of many domestic and legacy brands.
Much like Hyundai and Kia at the turn of the millennium, good service and support from a local dealer is going to go a long way.