Hello, I ask you if it's possible to edit old posts, especially when someone replied after. I try that, but I can't find the way. This function (that exists in a lot of other forums) would be welcome. Thanks.
There is currently a timer for editing implemented for one hour. In terms of why that is, the mods would be better to answer that than me.
There is a time limit on editing posts to avoid the content being substantially changed after other people have already replied (thus causing issues with consistency of discussion) - as well as to avoid abuse. I will note that the time limit on editing is substantially longer for Premium members. If you need content edited once the time limit has expired, you should use the Report function on your post to request that the moderators make the edit on your behalf.