There’s no moral obligation to make incredibly efficient and streamlined software. Solving the problem and proving sufficient value is usually enough.

Sure, they might get displaced by a competitor in the future - but by then they’ve probably got a large user base and a warchest to compete with. Slack is a great example of this.

If it’s software that’s life critical, then maybe, but that’s a small minority.

Markets and buyer preferences are always changing - I think it’s better to be agile (ie high developer velocity with talented product managers) to be able to detect and capture these shifts.