This notice from Microsoft:
“September 3, 2020: We will soon roll out the new tasks experience in Outlook on the web as we move from preview to general availability. With this change, we will remove the preview opt-in toggle; this means the classic tasks experience will no longer be available.”
I am still curious about what’s going to happen with future releases of Desktop Outlook, which is now the only way to see the older, and more powerful, legacy Tasks system in Outlook. We’ll see how that plays out.