Embacadero in the past usually narrowly followed Windows Policy in these kind of issues. Recently they seem to orient themselves more against Objective C, Mac (because of their iOS offerings, only their mobile offerings are LLVM), but that is also utf16
My guess is Embarcadero will adapt if their core targets adapt. Ranting against them (with baseless sentiment) is there for useless..
That is also my problem with this whole rant. The main problem is not UTF16, but there being two standards, with two opposing camps. Even if you thing UTF8 is superior, if your core platforms are utf16 oriented, you will spend your days fighting windmills