Nothing seems to be upgradable after the fact, with the things I got cut. Pre order lock in, lost a few things:
- Seat Massagers (I was ok with this one, I hated it but it was nice to have for passengers)
- heated armrests (this one sucked)
- dashcam (this one sucked)
- augmented reality (this one was ok, I don't use factory nav, but it's a nice party trick)
Post lock in, I lost:
- track pace (this one sucked, I loved looking at telemetry when driving hard)
- foot activated trunk (this one sucked)
The foot activated trunk I use quite a bit, but turns out the convertibles never had power trunk, so it was only used for open, so it was less of a loss. I have to close the trunk manually like a pleb regardless haha. I mean I had an option to reorder and hope to get everything, but I was done driving that Sentra.