I actually felt the same way about Salesforce until about a year ago when my company bought it. It certainly has a duplo blocks side that let's non technical users do complex things (aka Excel) but their backed is extensible through a language that is more or less Java for custom handlers/queries/etc and they are switching their front end to W3C compliant web components for developer maintainability after getting burned by rolling their own front end framework in the early angular 1 era. They have super tight integration with heroku postgres dbs (because they own them) and have some other best technical tricks up their sleeve to the point that I my opinion has changed quite a bit.