I remember Xs4all, sorry to hear they went under.

I also miss the brief moment when we had line sharing on copper telco networks in the United States. Most people were perfectly happy with the standard offerings from their local telco, but those of us who wanted more could connect with an ISP who offered service via a dry pair DSL connection. I loved my time on Speakeasy, for example.

I remember all of the flaws with the line sharing system, too, but it actually worked for the short time we had it, in spite of the problems. Asking a niche ISP to build its own facilities-based network is an exercise in futility for many deployments. Of course, cities or counties or public utility districts could do it but the incumbent providers don't like that.