They’re only upgrades if they work.
Remember, teams don’t purposely design bad cars, and the same issues they are missing in the initial design are going to effect the upgrades too, unless they understand and fix said issues.
Ferrari were all of that in 2023 with the SF-23.
And maybe this has become better as well.. Either way McLaren is the fastest car now from all data available
Maybe, but they have tended to overheat their tires in the race which results in tire deg.