Most of my career, I've worked for startups and small/medium sized businesses, mostly using Ruby On Rails or Node based stuff for language/frameworks.

In every single company I've worked for in the past 15-20 years in this capacity the biggest focus was to exit heroku as quickly as possible. The reason: Price. You don't get to charge a premium for tooling, especially not when open source tooling exists that lets you use cloud providers without paying "the Heroku Tax".) Is Heroku still using AWS/any cloud provider? They should have rolled their own infrastructure decades ago. Alas, they got bought by a shit show of a company.

(Note: I stopped working in 2023 due to health, and much of my early career was ASP/PHP/.NET)