[thisiswater]

As the author puts it: "It makes me less certain that this isn't the Extend in Embrace, Extend, Extinguish."

[pydry]

Other Microsoft OSS ventures makes me wonder if they haven't resurrected that policy too (e.g. the crippling slowness of azure mysql and azure postgres as compared to SQL server).

[pjmlp]

Google has largely outpaced Microsoft on what concerns Extinguish.

[easton]

Can you give some examples? I haven’t seen Google close source something lately, except for Go’s package hosting server (which makes me inclined to believe you, I just haven’t heard of other instances).

[lenkite]

All the Google apps that used to be open once-upon-a-time in Android and whose evolved versions are all closed source now.

[harrygeez]

Google Play Services pops to mind

[ex_amazon_sde]

"Extinguish" is often not the case in this decade.

It's all about capturing market share aka creating user lock-in.

[hedora]

User lock-in is how Microsoft has traditionally extinguished competition.

Microsoft Office is an early example. I know zero people that switched to it because they liked its functionality or user interface. They switched because nothing else could open Office documents correctly. Eventually, everyone I knew switched to it (and many happily switched away decades later, once “as-a-service” competition cropped up, solving the compatibility problem).