Here is a question (two questions) - are there particular platforms, or classes of platforms, where you worry about lock-in the most? And would it be useful fo

Here is a question (two questions) - are there particular platforms, or classes of platforms, where you worry about lock-in the most? And would it be useful for you to have a backup of your data from a SaaS vendor? Or is that not so useful without the subsequent "import" to another?