I am Global Services with United (although still waiting for my re-invitation for 2025 despite spending close to $60k on UA metal) so have a bit of experience with spend based status over recent years, after wailing and gnashing of teeth when things change, people end up adapting to it and on United forums, the thought is that there's still too many status holders but the spend thresholds are going up from 2025. Fortunately I'm 4 trips away from hitting million miler on UA which is lifetime gold for me and my wife and was based on BIS miles on UA metal so i may end up dropping down to 1k there and making sure i retain GGL as a priority.

Hitting the 40k spend on OneWorld the rate my travel is at the moment won't be an issue, it'll be interesting on the 32k spend requirements on BA, is that going to be all BA metal or will JV with AA go towards that 32k. Will spending (I assume £25k) on Amex count towards the 32k requirement. I would not be surprised if BA try and soften the percieved pain here with some starter bonuses like UA have with the PQP starter bonuses.

I did benefit from a lot of cheap business class flights up to Scotland if I was flying into LHR on UA helping with some extra tier points but there's probably less of an incentive there vs economy that's going to be a bit cheaper.