Q: Elder scrolls online craft skill caps

All 6 professions have 50 “levels”. Once you reach 50 you won’t be gaining any further Inspiration.

Depending on particular profession, you won’t need to level them up to 50 just to use and craft the best stuff. For Enchanting for example you only need level 42 to crafting the best glyphs (if I recall correctly).

Relevant: crafting guide.