You don't need to create a thread to collect those information, you can easily look it up using tools like https://builtwith.com or https://www.wappalyzer.com/lookup/. Just enter the url and you get a lot of information about the technology stack a websites uses. Almost every website is covered. Here for example the technology stack of Luckygames.io https://builtwith.com/luckygames.io
Sometimes people are just too lazy even doing the simpliest things in life.
Majority of sites are really built in PHP,Python or Node into their Backend and for Databases then its only on Mysql or on postre.
They differ on several aspects due to lots of languages that can be used.