From the view of an application dev .. 1 the reasons to chose OpenSSL over other crypto libraries are its rich feature set and wide portability paired with good performance across a wide range of platforms plus having a customizable backend (engines/providers).
2 the reasons to not move away from OpenSSL trusting in LTS releases actually being stable i.e., not causing any disruptions. (For both 1 and 2, a good security record is a matter of course.) IMO the current release policy of infrequent "big bang" releases serves 2 well, but largely neglects 1 (think e.g., about time-to-market for new processor features). That doesnt mean that we should take all features into LTS but i think performance improvements is an area where you should think about it, at least in individual cases. Patrick