Update packs on rolling release distros can break a system, especially huge update pack offerings. The last time I checked, LMDE had some pretty large update packs, and there were quite a number of breakage complaints. Maybe they've solved that issue by now. SolydXK may be the least likely to break, given that the devs vet everything before release and, if I recall correctly, their update packs occur a little more often and are a bit smaller, but it will probably happen to someone. And if that someone is coming from XP it will be a terrible experience. I would still recommend an LTS to someone new to Linux or coming from XP specifically. In the alternative, I would probably go with SolydX.