It really is getting bad. I use Opera as my 'daily driver' for work, and I get warnings on sites at least weekly where the site will either complain like I'm using some dangerous outdated software, or just plain refuse to work, nevermind the fact that Opera actually uses regular old Blink. Present-day Opera is just a minor reskin of Chromium - and I think Vivaldi is Blink too, right?

People are literally doing User Agent Sniffing again, and even though these browsers carefully craft their UA string to pass naive checks, the sniffers are hacking around that and urging me to "Download Chrome" to use a website.

Notable Offenders: Google Hangouts, and banks. Not impressed, Google.