It's a fair point. Most of our customers work with CPP, C# and Java in enterprise / back office contexts, which is why no PHP or Javascript right now - we've been tied up with other priorities. That said we just added Python to our main SDK and PHP is coming.
I would think that JS/TS support would be relatively high up... my own bias speaking, but a lot of development and effort to easing cloud apps is JS/TS centric.
Plus our enterprise automation product can basically talk to anything via REST API ( https://www.pdf-tools.com/docs/conversion-service/api/conver... ).
But yeah - now you got me fired up to annoy some colleagues ;)