Gathering some thoughts on the Z4....
The Z4 was always meant to be a stop gap before I found a better, more powerful sports car. It was a car that was there to scratch an itch.
However, as the issues popped up, the bills started adding up. I know there is that endowment effect, where you look at how much you have invested (either time or money) into something and it holds you back from letting it go. When you let it go, then you materialise the loss immediately. For most people, that loss is too much to bear - even if not financially, then emotionally.
Anyway, for me this was a fling. The last fling I had was on my Polestar, but I was fortunate to not make such a loss. On the Z4, the loss had to be taken in order to move one.
If I was more mechanically savvy (like some OGs on this forum), I would have soldiered on with the car and slowly fixed things and experimented with things. I appreciate that there are true Fanatics out there who enjoy working on old cars and perfecting it. I thought I could pay someone to do that, but I realise now that it kills the experience of owning an old car - you need to DIY.
Anyway, I do not regret owning this car. It was school fees that I needed to pay to learn about what owning an old car means and what is required from an owner to maintain and appreciate such a car.
For what it's worth, the new owner is a BMW enthusiast and will give this car the true appreciation and care it deserves.
As to what the next adventure is, will have to wait a while.