OSHPark is a nonstarter for many workflows because they don't do assembly. I can't do anything with a plain PCB!
And for me, I'd rather do my own assembly than pay $1400 for five boards from Circuithub that I can get from JLCPCB for $20 or OSHPark for $50.
For simple-to-medium boards you can assemble it yourself... No help if you're making a motherboard or whatever though.
And for me, I'd rather do my own assembly than pay $1400 for five boards from Circuithub that I can get from JLCPCB for $20 or OSHPark for $50.