No, I wouldn't. In fact I went the other way and traded the S15 I had from brand new (Feb 2000) for my 86.
I do miss it but LOVE my 86 as it is 12 years newer technology although I had looked after my S15 so well (completely stock) that it still had plenty of years left.
Very hard to find an S15 that hasn't been modified in a way you wouldn't do it. The rear wheel drive, with turbo, and no traction control has made them fairly scarce as a lot have been written off. That and the fact that they are still one of the most stolen cars here.
Here's what I traded in a photo just before I sold.
