That was absolutely true way back when the industry was new and there were myriad system vendors with their own operating systems. We have learned a lot since

That was absolutely true way back when the industry was new and there were myriad system vendors with their own operating systems. We have learned a lot since then, and we know how to address these problems: openly specified document formats and protocols. Programming languages with portable runtimes and libraries. Open source software. Web Applications. The world is a much different place from when you felt trapped because your Visicalc files were on LDOS floppies that could only be read by a TRS-80 Model IV.