Almost every DO, vultr, Linode, etc guide I've seen for LAMP server config uses Apache. I also suspect apache, being the old guard, is the defacto standard in various appliances, routers, firewalls, IoT, etc devices. Its our generation's BIND. Its probably never going away, even if better competitors come and go.

As far as stats go, according to netcraft MS's IIS is leading with Apache second and nginx a distant third. Of course, this data isn't terribly reliable as netcraft can only see front ends, which may hide whats behind the load balancer, but IIS/Apache are still kings.