Fortunately, as bad as this is, I don't believe many companies will implement the worst version of it. (Server side + subdomain + different name scripts)
The reason is that we had server-side analytics available for years and virtually every big website still implements the clientside part. If they can't be bothered with that, I don't expect they'll move the whole tag manager any time soon.
The reason is that we had server-side analytics available for years and virtually every big website still implements the clientside part. If they can't be bothered with that, I don't expect they'll move the whole tag manager any time soon.