- Didn't choke when having ~50 request 'tabs' open
- Didn't try to sell me shit
Granted, Postman had quite a lot more tools in its box for scripting, testing, sharing etc. but I didn't need those.
Insomnia has got a bit fatter since then, but it remains more responsive than Postman was.
Because it's OSS they didn't feel the need to bog down a perfectly functional product to drive a valuation up.
It's a carbon copy of what Postman started as.