Killing multisite is preposterous. It's green. Only one central set of php files on my server and I can run hundreds of mapped domains. That's healthy for poor opcache. Let alone better management of sites, which is so much less work with multisite, all subsites load faster and in all consume less resources than single installations. The brouhaha about a single database is overkill. Plugins now offer migrating multisite subsite to single installation. And on nginx for mapped domains I don't even need wildcard SSL. Just build separate server blocks for subsites, point root to multisite root and get individual working SSL certs. Fast, efficient. Kill multisite? Rather make network subsite user registration part of core and give us server and site administrators some needed relief.