For Blogger posts that is. I have been able to extract my old WordPress posts one by one and am now in the process of bringing them over here. It is a long-winded way round but as far as I can see, it’s the only way to do it and I am glad that it is possible at all.
I am rather counting on Blogspot being around for a long time and for the software that powers it to be updated painlessly with no input needed from me when and if it happens. At first, maintaining my own web site was fun but it now seems just a chore and even though the WordPress installation I had on it was not difficult to manage, it had developed some irritating quirks like substituting double apostrophes for a single character.
I gave up maintaining a gallery of photography on my own site some time ago in favour of a SmugMug hosted account and that has proved a good decision, it may not be too much longer before I find a way to offload my remaining stuff on woodwork and genealogy and can get out of the site management lark altogether.