Indeed. Niche is a fairly large umbrella. If no other shop is using the technology you work with, nor wants to, then what would they want from you? At best you

Indeed. Niche is a fairly large umbrella. If no other shop is using the technology you work with, nor wants to, then what would they want from you? At best you could argue "transferable skills" - but since they can otherwise get someone with all the experience on their checklist, your competitive value is nil. Should you be an exceedingly niche programmer, you're valuable because you're more difficult to replace. Leaving is also difficult, so there is the balance.