Gmail now allows you to disable conversation view
By: Team Ifairer | Posted: 08-08-2018
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This feature was introduced to the web version of Gmail first and it seems as if Google has witnessed an uptick of accounts that have flocked to disabling Conversation View. Both methods have their strengths and weaknesses, and this is especially true if your email chains are short or very long. For example, responses to emails with Conversation View shows new responses at the bottom. This can be a hassle for those tremendously long email chains. Google tried to help alleviate this by breaking conversations off when they got to more than 100 emails.
source: www.xda-developers.com