As a number of others have done, I've added a disclaimer to the top of the archive page saying that old posts may not reflect my current views.
It's not that there is anything particularly contentious but that my take on things, especially social media, has shifted over time.
Just because I may not think a certain way, however, doesn't mean that I can't be proud of what I have previously written – some of it is among my best writing.
I think it is also the case that what I have previously written would still be valid were things online to have remained how they were, but the landscape has shifted. It may not necessarily be my thoughts that have changed but that they are incompatible with the world in which they now exist.