I think this is a self-aggrandizing myth that is common in forums like HN with lots of programmers and designers:
- UI's usually do not improve. They "improve" by making subjective changes for the benefit of the maker (often at the cost of the user).
- Platforms are constantly shifting when they are owned by corporations. At first, businesses will penetrate the market by creating a competitive platform. Once their platform has reached critical market share, they will switch to milking their users who are now trapped due to vendor lock-in. This forces users of proprietary software to constantly jump ship in order to get a good deal.
- Features sometimes expand, but most apps will reach a point where it no longer makes sense to add additional features. In the free-software world, we generally try to make an ecosystem of programs that work together: if a single program is too complex, its features may be divided into several smaller programs. In the corporate world, a single program may be bloated and expanded long past the point at which additional complexity will serve the user- so long as developers can continue to invent new ways to extract money, data, etc from their users.
- New vulnerabilities may be uncovered, but generally vulnerabilities are only added when the complexity of program increases. Vulnerabilities don't just appear out of nowhere. If you write a program, it doesn't just become more vulnerable over time just by merit of being old.
- Server bills usually need to be paid because people have inserted themselves as middlemen. If the internet was designed in a way that did not require paying a racketeering fee for DNS, PKI, etc. then we would see a lot of decentralized alternatives to "essential" services.
It's hard for me to entirely put into words how flawed your statement is. If you have time, you may want to check out a book called "Bullshit Jobs: A Theory" by David Graeber (https://libgen.gs/edition.php?id=5852679). It might give you a new perspective on the software industry.