It rather looks like it depends on who makes the product. One thing to look at is who has established trust and (so far) maintained that trust. For example, AWS has said that their products will get cheaper over time and that they wont deprecate any. The fact that they've managed to do that for 15 years or so means they have a built a lot of trust - which is itself an investment that they would be foolish (financially damaged by) a decision to break that trust.
Meanwhile, Google has firmly established that they will destroy any product at any time, and you would be insane to build a business on their products.
Adobe and Microsoft make meh products that dominate industries, and you are at their whim, and look, these two companies provide all your examples. (And to be fair, SourceSafe went away because it was not reliable and any sane business paying for a VCS switched to perforce before eventually moving to git like everyone else).
IBM will sell you anything as long as it's called "Watson" so who knows which Watson has been discontinued or not.
Meanwhile, Google has firmly established that they will destroy any product at any time, and you would be insane to build a business on their products.
Adobe and Microsoft make meh products that dominate industries, and you are at their whim, and look, these two companies provide all your examples. (And to be fair, SourceSafe went away because it was not reliable and any sane business paying for a VCS switched to perforce before eventually moving to git like everyone else).
IBM will sell you anything as long as it's called "Watson" so who knows which Watson has been discontinued or not.