Centralised, monolithic online services. Even when they were ‘good’, I was leery of services like YouTube, Facebook and WhatsApp because they made no attempt to be interoperable or peerable. Two GMail users will have a richer experience emailing with each-other than they would with someone on, say, Yahoo Email or an Exchange server, but it would always work, eventually, somehow. Obviously we now have the concept of the Fediverse, but federated peers forming ad-hoc connections using an lowest-common-denominator protocol is the basis of the whole Internet.
Centralised, monolithic online services. Even when they were ‘good’, I was leery of services like YouTube, Facebook and WhatsApp because they made no attempt to be interoperable or peerable. Two GMail users will have a richer experience emailing with each-other than they would with someone on, say, Yahoo Email or an Exchange server, but it would always work, eventually, somehow. Obviously we now have the concept of the Fediverse, but federated peers forming ad-hoc connections using an lowest-common-denominator protocol is the basis of the whole Internet.