Things have come a long way with software like SoundID and it’s so good to be able to reference with correction in and out and sort some room issues.SoundID (full disclosure, I consult and write for Sonarworks) is great to add the final touches to a well designed room and properly integrated speaker setup. SoundID can nail the stereo image by time-aligning the two speakers and correcting small performance differences between the two monitors.
You can’t fix time domain problems with EQ, so any room modes or reflections will not be corrected by SoundID. Have you experimented with the different phase modes of SounID? I find the “mixed” setting to be the most musical. I love SounID on my speakers and headphones but some people feel differently.
In the early days back in the ‘80s there were room correction options for studio monitoring, but most were super expensive and out of reach of most private individuals and small studios. There were hardware boxes which involved a complex setup routine and these then stayed in place in your monitor path - bad luck if you had several sets of monitors $$$.
Companies like Genelec also built correction into speakers.
Back in the ‘70s Philips developed the Motional Feedback speaker which had inbuilt bass correction - I was an apprentice with Philips at the time, working as assistant in the design labs division some days a week and these were a new step into the Hi-Fi market by Philips. A lot of the Hi-Fi nuts pooh-poohed the idea saying it wasn’t a “pure” sound. Funnily enough some of the great albums by Pink Floyd were mixed on these - The Wall, The Final Cut and The Division Bell which I’m sure the same Hi-Fi nuts listened to on their systems.
Trinnov have a really nice correction system but it’s expensive compared to the SoundID and does involve hardware purchase and either renting or buying the special 3D reference mic - I recently did a control room setup with this system, going back next week to do alignment with sub in place. This does all facets of room correction however with phase and time corrections incorporated as well as EQ levelling.