Yes, I'm using custom fields for a multitude of things, master layouts and marketing layouts are the most common, but I also database the XML exports for fun. If this was reliable I'd be able to build a more sophisticated database.
Using the properties system is an interesting idea, but I don't think I'll be able to use it in any auto text situations. It's a "catch 22" but I do like it and I'll look into this further!
Versions 10 to 27
Metabox Prime-X P775DM2-G (Clevo),
GTX 1060 6GB GDDR5 VRAM - G-Sync,
i7-6700K (8M Cache up to 4.2 GHz),
32GB DDR4 2133MHZ,
512GB SATA 3 M.2 SSD,
Win 11 64