I went through the same thought process. Started with a Plaid + order, then after I thought about it for a few weeks, changed to a LR.
The main thing that did me in was the fact that they are the exact same car except for performance. Every other car manufacturer out there, their top of the line performance version of a car looks the business. The Model S? You get a cheap small spoiler you can buy for $500 and some red calipers. If I’m spending that kind of money on a performance car, you’re damn right I want to “peacock”.
There’s no logical reason to select the Plaid. It’s emotional. The visuals of the Plaid just didn’t stir my emotions.
On the flip side, as others have stated, the LR is still crazy fast. I think the LR is the best value in Tesla’s fleet. It’s “only” a $25k increase over the M3 Performance, but is probably over $25k more car. I suspect the LR is going to retain its value really well.