It looks like that a some sort of virtualization/windowing is implemented on a long conversation. This creates a practical problem when a user use browser’s “Find in page” (Ctrl + F shortcut) to search in a conversation, the user is unable to find the part of the conversation by particular keyword.
Say for example, when a user discuss with ChatGPT about a problem solving related to coding, ChatGPT suggests various techniques and offers sample code snippets. The user continue the conversation, discuss and debate with ChatGPT and so the conversation grows larger.
At one point, the user may need to find a section where ChatGPT suggested something or a code snippet which ChatGPT shown as example. But, since the conversation grown larger, except the current part of the large conversation other parts are removed from the DOM and so searching with Ctrl + F does not work.
Therefore, if a in-conversation search/find option is provided the user can search within the particular conversation. By now a user need to scroll up continuously, wait for the parts to load and then use browser’s Find option which is tiresome.