alt Hacker News"multiple vendors, but only one of them is nice enough to give the product away for free" is not "effectively single-vendor".
The other CAs aren't prohibitively priced for anyone who has a business need for lots of certificates, in case Let's Encrypt disappears or goes rogue.
> other CAs aren't prohibitively priced
Not if you look at the per-cert pricing, but if you factor in the cost of "dealing with incompetent sales" and "convincing accounting to keep the contract going", they absolutely are.