Eh, 3.3 Core is still pretty darn capable. 4.0+ mostly just added tessellation/compute shaders & quality-of-life and/or AZDO[1]-style features.
[1]: https://en.wikipedia.org/wiki/Glossary_of_computer_graphics#...
[1]: https://en.wikipedia.org/wiki/Glossary_of_computer_graphics#...
Would like to have image-based verification for certain classes of tests, and we use Azure CI pipelines - seems their VMs don't have hardware support at all for OpenGL (on any platform).