Who still needs a 32 bit collector?

In order to simplify things (for users and for our developers), we are debating whether we can drop support of 32 bit collectors, so all new collectors will be 64 bit.

Very few people ever download the 32 bit collectors, and the ones we have reached out to have said they could run 64 bit.

Anyone got a compelling case for still running a 32 bit collector?