Evolutionary pressure means that variants which are better at transmitting under social distancing pressure...will invariably out perform against other variants when under social distancing pressure.
The obviously overlooked factor in the rapid spread of this variant in India then beyond, is the huge, tightly packed religious and political gatherings which occurred recently in India, which wasn't immune to covid, it simply hadn't had a good superspreader event as we had in our absoutely essential
ski hols in early 2020. This outcome was totally inevitable as soon as those events took place.
The only questions which matter are whether the vaccine works against it (current thinking is "yes") and whether hospitals will be overwhelmed beyond what is normal for a big flu winter.
We're far enough along with vaccinating all vulnerable, elderly and even the middle aged that it seems statistically unlikely that the hospitals will be overwhelmed by the severely ill.
The inevitable refrain is "but long covid!", to which I would say that we have had "long flu" and "long cold" for decades (variously diagnosed, often in women, as fibromyalgia, chronic fatigue, depression, anxiety and basically malingering) and yet we never put the world to a stop. Indeed, if vaccines prevent most severe illness, it stands to reason that they will prevent most or all "long covid" also.
We have vaccines. They work. Time to get on with it.