Twitter Timeline Situation
The change came about due to feedback from many users of the platform saying they prefer the old format. Originally Twitter was structured in a reverse chronological order but they changed to a default format time in 2016 which became their algorithm timeline for popular tweets & tweets from accounters users regularly interact with. So if we look between the lines users prefer to have an unfiltered chronological timeline full of content.
Twitter's move in 2016 to a new Twitter timeline was controversial but it did have a purpose, the purpose was to have the timeline featuring a higher quality of posts and this would be mean older posts mixed with new ones as all in the users feed at the same time. This would be achieved through algorithms and the majority of major social media platforms have these algorithms in place.
Twitter Support News Update
The official Twitter Support account posted the following:
"So, we’re working on providing you with an easily accessible way to switch between a timeline of Tweets that are most relevant for you and a timeline of the latest Tweets. You’ll see us test this in the coming weeks," the account posted.
But for now, it will offer an option that allows people to turn off the algorithmic timeline.
"Meanwhile, today we updated the 'Show the best Tweets first' setting. When off, you’ll only see Tweets from people you follow in reverse chronological order. Previously when turned off, you’d also see 'In case you missed it' and recommended Tweets from people you don’t follow."