Successful products

Every time I stumble on articles or posts discussing tech products, I’m perplexed when someone uses the word “successful” to describe a product with a lot of users. There’s a better word for products like that, and that’s “popular”. Maybe I’m the odd one here, but I don’t think the popularity of a product is what we should use to evaluate if it’s also a successful one. If I were given 50 billion to spend, and I used it to open a restaurant where everyone could come and eat for free, ...