bluelines:
Yes, really. Out of the cars you mention only the McLaren comes close to be a competitor and it does cost a lot more, i.e. offered at a higher premium. The rest are all go-carts, toys and some rich dude's hobby project.
Lotus on the other hand is a better comparison and we all know their situation in the past 10 years.
"...they develop and beat the hell out of the Porsches in their respective niches", no they don't because Porsche is not in the go-cart niche.
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You wrote: “Out of the cars you mention only the McLaren comes close to be a competitor”. At the moment, Porsche has no product which comes near the simplest McLaren, and when they try to have a go at it … look at the 918 vs P1 and you laugh (or cry), probably depending on the country where your allegiance lies.
What it is to admire with McLaren (and the others I mentioned above BTW) is that they genuinely try and produce great sports cars and fun cars while our beloved Porsche is genuinely getting way from this business based on their recent evolution.
You also wrote: “The rest are all go-carts, toys and some rich dude's hobby project”: what do you think one would look like in their brand new GT3, GT3 RS of even worse GT3 cup cars on a circuit when overtaken by someone who actually knows how to drive vs has thrown money at the problem? Some of the cars I mentioned pass FIA crash tests that a GT3 would probably only dream of getting through.
I am sometimes with GT3 cup cars at track events. For some, the size of their bellies, matching that of their wallet, makes me wonder now that you mentioned “rich dude's hobby project”.
I am not here to convince one who is stubborn and partial, but to help readers be more critical thinkers and sort the marketing crap (the car vs what you need from it) to determine what they really need personally and are expecting to get from the car.