Earlier quoted context omitted.
Because the FOSS generation feels entitled to be paid while refusing to pay for tools, which leaves the typical enterprise customers as the only place one can make money with development tooling.
That's not true. As a FOSS lover, I pay for a lot of tools. Both development related and unrelated. Moreover, some of the tools that I pay extend on FOSS software (Tower, Viscosity, Permute) and some of are FOSS already (Cyberduck). The thing is, as a person I don't want to feel ripped off. I don't subscribe to JetBrains since my work doesn't require these tools (also, I use Eclipse for 15+ years and it works well).…
I agree that intellij and eclipse are similar, but as soon as you work with C, C# or Python, there's very few good open source alternatives.