Android 4 was the reunification of Android 2 for phones and Android 3 for tablets. I think it coincided with the launch of the original Nexus 7 and Google Assistant, and I think I was installing third-party Android 4 builds on one of the first US phones with 4G LTE.
There used to be a respectable web 3.0 but now we just have web3 crypto grifters.