I've been building my project[0] for 14+ years, but I'm still looking forward to the day I won't have to worry about next month's rent. Customers are happy though. Last week I got messages from two customers that purchased more than 7 years ago, because they wanted to install/use the product again. It was fun to revisit our email conversations and to see how much the product has evolved since. What's funny is that the feeling is the same after 1, 5 or 15 years. There's always stuff to optimize and improve. Unless it's a standalone experience (e.g. game or a movie), most software and tools do need constant updates and improvents to keep up-to-date with the current world.

What's funny, is that I had many other projects attempted over the years, but many rise and die quickly, yet the one that lasted the longest is also the one that is likely to last longest from now.

[0]: https://uxwizz.com