I think Lucas had his mind made up long before anyone uttered Han shot first. The marketing hook back in 1995 was One last time.
https://youtu.be/V9077YR0t9E
Sure, but what happened in 2006? I also read a comment a while ago by a person who had worked on the 2004 master, that Lucas did consider also restoring the OOT back then, but ultimately didn’t because of time constraints related to the DVD release date. So, while I believe Lucas allways intended to phase out the OOT, I think he wasn’t completely opposed to restoring the OOT at some point, but after all the negative feedback and often personal attacks in response to the SE and PT stuck his feet in the sand, because he wasn’t going to let some angry abusive fans dictate what’s going to happen anymore than the studios whos meddling he worked so hard to avoid.