I believe I read something back in this thread that they would have to be replace sooner than OEM or something like that?
I mean it's certainly possible, but it's probably one of those cases where it'd be marginally faster wear. I think a lot of what you've read is based on sort of the history of car lowering culture. I wrote about this earlier, but lowering cars really came to popularity in the 90s with Japanese compact cars. Notably the Honda Civic. The Honda Civic is a true economy car, it was never designed to be sporty (certain models, SI, etc. later filled that gap). People threw very aggressive lowering springs on those cars. Also, the market was demanding very stiff springs as that was what people wanted. Stiff means higher spring rates and more stress on dampners. So you had very aggressive springs, very high spring rates and factor struts that were built for cost and compliance, not performance. Even then, most people just replaced the struts with reasonable upgrades later (Koni, Tokico, KYB, etc.). Given the popularity of the Model 3 and lowering, it's possible reasonable aftermarket struts become available years down the road. Shocks aren't that expensive so even if you have an issue years down the road, it's not going to be some huge expense.
I've been lowering cars since the mid-90s, and I've lowered both econo cars and sports cars. I think if you look at people doing mild lowering on high-end cars (BMW M3, Audi S cars, etc. for example), factory struts have proven to hold up well. The P3D should follow that theme. Also, the spring kits for these cars (and the Tesla) aren't designed for bone jarring rides, the spring rates aren't ridiculously higher as was the case with the econo car scene. The market for people lowering $50K+ sedans requires more compliant rides and thus softer springs.
So while lowering springs and particularly ones with high spring rates do have the potential to wear out cheaper struts, the Model 3 Performance has reasonably performance oriented struts to begin with. Frankly, I think the struts with or without lowering springs will outlast most peoples' ownership of the car. You don't hear too often of sports cars having blown shocks, it's typically cars that have very cheap suspension systems where cost is the driving factor.
From TireRack.com, while this is mostly marketing jibberish to encourage people it's ok, but there's some truth there. :
Myth 1: If I buy lowering springs, I can't use my original shocks.
Fact: Springs that produce mild lowering of about an inch work well with newer factory shocks. In fact, Eibach's Pro-Kit Spring Set and even their more aggressive
Sportline Spring Set are designed around a vehicle's original suspension.