The Prius is fine. Practical vehicles. Probably still a more reasonable choice for many. But, Tesla made electric cars look like the future, even to the average person.
I must add that I am not really a Tesla zealot. I drive a Civic, Teslas seem too expensive (not necessarily over priced, just too expensive for me) and have their fair share of issues. But what they did for the perception of EVs is different than what anyone else has done imo.
The Prius at least fit into Toyota's market segment.
[1] This is not totally true. There were some once off electric cars in the 1990's that were sporty. Friend dated a women that owned one. It only had a range of about 40-50 miles but it was FAST.
Tesla did a great job at making EV cool, there's no question about it.
BUT, economics of that are still TBD. They still fail to achieve any sustainable profit as a business, few years after their mass market vehicle debuted, and have to keep on raising money, on very unfavorable terms.
They struggle to produce it cheaply enough, at least as of right now. Manufacturing, at scale and within costs is really really hard. Tesla's initial math for cracking the economy was based on full automation of the production, that failed spectacularly. As a result they have a lot of human labor costs they didn't plan for, so problem of optimizing it got even harder.
Did Tesla made desirable product? Yes, of course. Can they crack the economy of it? We'll see.
You’re correct that Tesla’s future and costs are uncertain, but that’s irrelevant. What is relevant is that the production cost of a Model 3-type EV will never be as high as it was in 2018. It will never be as high as it is in 2019. Even without miraculous supply chain improvements, the cost of lithium batteries and electric drivetrains is on a relentless downward path. If Tesla can make one now at $10 in profit (obviously they make more than that), then whichever company is doing so in 5-8 years will be earning thousands in profit. And if the manufacturer is not BMW, it will be the end of that company as a viable competitor.
Investors can lose their shirt on a viable company. Just as they can make bank on a company that's a flash in the pan. Investors can often make money on companies that are actually failing and going to fail. There is probably an correlation between how hardball the company plays it's investors and the companies ultimate viability.
Same with the electric RAV4, which I believe was the first EV in the past 20 years or so. They made it, and then barely changed anything at all to it 20 years later.
Toyota doesn't care about EVs and never did, even when it struck them in the face.