It's important to note that Google Wave has failed as a PRODUCT, not as a CONCEPT. There are a number of incredibly successful post-wave platforms, like Bitrix2

It's important to note that Google Wave has failed as a PRODUCT, not as a CONCEPT. There are a number of incredibly successful post-wave platforms, like Bitrix24, which is way more popular than Slack/MSTeams in Eastern Europe or Vietnam or South Africa, for instance (make sure you try https://bitrix24.com https://bitrix24.com if you've never heard about it). Here's my analogy. Google Hangout has failed (as did G+), but Zoom is booming as are Facebook or VK. While I agree with much of the analysis, it's important to understand the difference between concepts and products. This is very helpful when trying to understand why Skype had been struggling.