[Pasha Paterson]

Sol would be pointless if the series remain in clear weather and midday.

For a series that ran at night or in weird conditions, as Andrea and Russell said, that either forces people to practice more, or endangers everyone because nobody practiced properly. The ACC series will likely be a much better forum for night and variable-weather events; I believe SRS is planning to try this already.

If all you're concerned with is visual effects, you get those from Custom Shaders Patch, not Sol. And you can even get significant improvement without CSP; just use a PP filter like Natural Mod Filter.

CSP and Sol are in a bit of a weird state at the moment, because RainFX has proceeded for a long time, and a lot of car and track configs have already been modified for it, but the "public" versions don't actually support it yet. I went through a couple of months of being unable to use CSP at all until I reverted to old settings, and I never did figure out what the actual problem was. One of the philosophical choices of SRS is that it is accessible to as many users as possible and the additional GPU load and variable reliability of CSP make it too risky for universal application. That said, SRS is already using some content that requires CSP so time will tell.