[anstarovoyt]

>Secondly, the free JetBrains IDEs also lack devcontainer support

Actually, there is a significant difference between the community versions (e.g. for PyCharm) and the versions available for non-commercial use. The latter are full versions of the products without any reduced functionality, whereas the community editions have certain features trimmed.

[OutOfHere]

JetBrains simply is uncompetitive. It doesn't make sense to have to pay for an important feature (container integration via devcontainer or docker) that is already free in a competing IDE (VSCode).