LetsEncrypt Show more
Even though it's a single point of failure the appearance of LetsEncrypt has been an important factor in the re-decentralization of the web.
I first started running gnusocial some time in 2015. I would have started earlier but I only had a single TLS certificate to be used sparingly and didn't particularly want to run it unencrypted, given firesheep and all that. Self-signed certs were also an annoyance since they tended to produce a lot of browser warnings.
The cost and complexity of obtaining CA certificates was a limiting factor before LetsEncrypt.