I don't believe LE will ever come out of it's "raspi is the only system we really work for " niche
These days LE runs on a wider range of hardware than ever before, but the level of support we receive from upstream maintainers on Intel hardware and most ARM SoC platforms isn't equal to the support that we see from the RPi developers. Project staff are frequently asked for recommendations. Do we suggest something we know has a few glitches and glacial support (Intel) or relies completely on community development (Allwinner, Amlogic, Rockchip). Or do we suggest an RPi board with few issues to report in the first place, and anything we do flag is normally fixed under 24 hours by Engineers super-keen to help and get it resolved. Our influence on the userbase is minor though. Recent modern NUC devices and derivatives are good, but not as-good as the devices that NUC reputations were built upon in the past, and users talk to their friends and relatives and the easiest-to-use and reliable devices are the ones that are purchased most.