Well, I'm using a diffusor-condensor setup with a LED head, does that count? No, it's not 'professional' in any way. It's a hobby project that sort of got out of hand and turned into a functional machine, and somewhere in the process I ditched my other enlargers because I didn't see the point in growing a forest of enlarger columns. I can only use one at a time anyway.
But what gives? An enlarger is basically a fancy slide projector. It shines a light through a negative and a lens to project an image onto a piece of paper. As long as it does that reasonably well, consistently and is easy enough to use, it's fine. I see no reason to fuss over the question if it's 'professional', fashionable, etc. In the end, if it gets the job done, I don't really care one way or another how it does it. Now I'm happy with the Durst 138 with its Frankenstein light source, but if life changes drastically and somehow I find myself 10 years down the line with only a simple 35mm camera and an old and rusty Meopta enlarger I saved from the scrapheap, I wouldn't lose any sleep over it either.