If you're going to discount all those things, then it becomes a bit of a moot point. You might as well say you'd rather a Maserati MC20. No one ever suggested the GR is the most fun car with money no object, and saying that there are more fun cars if you've got the cash is not really going to upset people.
By "discount" I didn't mean "disregard entirely". Bad wording by me. Perhaps a better way of putting it is if you're willing to shift the balance of those compromises, and consider having a second car, then there are some cars which serve better as a toy, regardless of their age. If I'd made the choice to go for a daily driver and a weekend toy, then I'd be willing to have the toy be older and cheaper anyway. But it's still a balance of what I can practically store, or what reliability I expect, the effort expended in running two cars, etc.
I wasn't suggesting a "money no object" scenario, because as you rightly say, that would be silly. I'd have a Bentley and a McLaren or something for the weekend
How old are the ones near £30k? They need to be fairly young to be comparable.
But they don't. They don't
need to be directly comparable, that's my point.
If I was in the position to be able to have a boring daily driver, and then run an Elise as a pure weekend toy, then I wouldn't be shopping for the newest example I could find anyway. I'd only have made that choice if I had somewhere I could store such a car, garage or at least off road, and not have to rely on it, so therefore I'd be happy to own an older, cheaper example. And there seem to be quite a few ~20 year old examples for around the £15K mark. That wouldn't bother me, as people aren't buying these to rack up miles anyway.
So for the £30K I spend on my GR86, I could have spent ~£10K on a boring hatchback as my daily driver and then spent the rest on an Elise purely as the weekend toy which, as Swizzle alluded to, is
probably a better pure driving experience than a GR86. But I can't make all those other compromises easily - I can't easily store two cars, I don't want to tax/insure them, I don't have a garage in which I could easily maintain an aging Elise - so owning just the GR86 is still the best option for me (and many others, I'd wager) and gets us 90% of the driving experience offered by more hardcore cars anyway.
Should point out that all of this is just musing, but really it's heaping praise on the GR86. I can't think of another car which offers the same blend of fun and practicality, other than perhaps the MX5.