They do share. My local church has Telkom & Cell C on their steeple. Looks no less ugly unfortunately.Seems like they have the same challenges as SA.
Hopefully they look at deep-sharing i.e. share the antennas and cables
Otherwise they will end up with 9 of those ugly antennas per church
In the UK there is infrastructure sharing, (EE/Three and Vodafone/o2) so the max would actually be 2. You also wouldn’t have 3 sectors in a setup against the wall, but even if you did it is possible to have slim antenna where 2 or 3 panels fits into a single enclosure.That is 1 antenna, each operator puts at least 3, multiple operators = multiples of 3