Wasn't there another TAS of this in progress by JohnP55, or am I severely misremembering the SPM WR progression video?
There is. This is a TAS by a member who has left the community and has spoken to no one in months. They have not said anything about this project, and I and the community only know about this TAS because someone DMed me about it.
The projected time save, using all the new time saves found over the last 4 years is 20 minutes. This TAS barely saves 5 minutes. The only reason why this beats @Karaage's TAS is because it uses many new glitches, including Scanner Skip which saves 4m30s, and Midair Chest Jumps which save 1 minute total. And even with 5m30s of free time save, PTL still manages to save less than that. This alone should make obvious the level of optimization that this TAS manages to avoid. Another is the number of rerecords. PTL made the entire TAS in 11513 rerecords. For the record, at the time of writing this, my WIP TAS is in Chapter 2, and has 44488 rerecords, almost 4 times as much.
I don't have much else to add, as others have already pointed out the many segments which are unoptimal and, in some cases, slower than RTA. As @llSacredGhostll said, we in the SPM Speedrunning Discord Server will be more than happy to answer any questions verifiers or lurkers may have about this situation or TAS at https://discord.gg/dbd733H.