A lot of good points but a few very misinformed premises
Can't debate everything in one comment but 1/ I would suggest to make sure that there is good distinction between multi-cloud and many-cloud. There is no success example today of a multi-cloud setup that actually works for a reasonably complex company. 2/ lock-in is not what was infered here; there is no lock-in when the customer chooses your tech because it is better than any alternative or so innovative that nobody else gives you the same benefits.