Your no true Scotsman fallacy is showing you don't even know what a Scotsman looks like. Virtually 100% of patent holders sit on all their patents for the entire duration of the patent.
waiting for the patented technology to be ingrained in the industry
Dolby actively used their patents and actively defended them. They created that technology and marketed it heavily. They didn't sit around and wait. Just because they make most of their money from licensing doesn't make them a patent troll any more than every university in the world is suddenly a patent troll by your definition.
Yes, but using them offensively after sitting on them violates the doctrine of Laches.
This isn't offensive. By all accounts their licensed product has been taken without a license paid.
In effect, they sat on the patents so that people would end up depending on AV1
Congrats on falling into a vortex of ignorance. Headlines are fun to latch on to, especially useless ones likes Slashdot headlines. Dolby isn't suing Snapchat for AV1. Dolby is suing Snapchat for not paying HEVC license. AV1 is just caught up in as a listed example due to Snapchat's HEVC-AV1 transcoder being one of the infringing items on the docket.
At this point, it would be entirely reasonable for a judge to declare that because they failed to act against AOMedia
That's not how the law works. AOMedia has infringed zero patents. You can't infringe a patent by creating an algorithm and publishing it online. If that were the case you may as well say the US Patent Office is infringing patents. Businesses using products infringe patents.
they lost their right to sue AOMedia for damages in creating the patented technology
Literally no one is suing AOMedia.
And if that happens, I will laugh so hard.
You're going to live a sad and miserable life if you're waiting for a completely unrelated and impossible fantasy to bring you joy.