Re: What's all this then?
The effect is to create a market opportunity that will quickly be filled, US kit replaced.
The same effect (forced decryption of customer data) in Snoopers Charter that means that every conversation between customers has to be intercepted by the vendor.
Communications product vendor Charlie has to include himself in the encrypted discussion between Alice and Bob, because as the vendor of their comms software and being a British company (regardless of where Alice and Bob are) Snoopers requires he decrypt their comms.
Belgacomm spings to mind as an ex customer of any UK kit, or kit from UK companies. For UK that is only communications satellites affected I think?? Cloud services, data processing, and a few others will be hit.
So your private Alice-Bob comms also include Vendor Charlie, his friend GCHQ, their friends abroad (=5 eyes), UK police (via info sharing), and everyone from traffic wardens to animal charities via the UK's slack data protection system. Shared with everyone but courts and judges to avoid any kind of legal process or privacy right. Natch.
But I'm sure their chief will explain that their backdoors won't affect business because nobody has a choice!
But Brit Kit, not with a free extra account.