I feel like that's because XSLT introduced so much complexity that mere humans found it impossible to work with. I've searched in vain for a decent XSLT editor

I feel like that's because XSLT introduced so much complexity that mere humans found it impossible to work with. I've searched in vain for a decent XSLT editor to help me; the ones I've tried have themselves been incredibly complex. The idea was good, but the implementation is the stuff of nightmares.