Everyone is talking about the Cybertruck, but both the 3 and the Y have plenty of engineering problems as well. I believe both cars are listed as below-average reliability by CR.
Worse, there are no 3rd parties producing cheaper suspension parts, so your old Model 3 is going to have to spend 2000-3000$ on an yearly basis until you get sick of fixing the suspension. Tesla claims to have fixed the issue on newer models (and apparently they did a lot of work on the suspension), but they don't really take responsibility for their old cars so I doubt they will take responsibility when their design causes problems for you.
I do enjoy driving my 2019 SR+ Model 3, but I hate when people do the whole "Well on first principles, EVs have less parts so they are more reliable..." thing. My Toyota Sienna has been far more reliable than the Model 3, despite having many, many more parts.