In the world of Linux, 'no major OEM adoption' is the norm for most distros especially with no substantial corporate backing. UBports is definitely in the top

In the world of Linux, 'no major OEM adoption' is the norm for most distros especially with no substantial corporate backing. UBports is definitely in the top 5, if not top 3, of (free/libre) mobile Linux distros. So yes, for people who are into the non-corporate Linux distros, UBports is going strong. But all that really means is actively maintained and has a reasonable (by open source standards) number of users.