It takes a lot of effort to keep the fallback mode working. I don't see how you think it didn't receive much development work. Loads of work went into the 3.0 f

It takes a lot of effort to keep the fallback mode working. I don't see how you think it didn't receive much development work. Loads of work went into the 3.0 fallback mode, and the same for 3.2. It doesn't appear to be used much though, so when the software rendering is good enough, it likely will be removed.