Decoding and further processing of the components - limited by the region. So no components outside will not be decoded, validated and updated.
But the encoding(updating components outside the region) - is available by setting renderregionOnly to false.
Please specify the case more clearly if I miss something in your question.
I'm back from vacation today, so sorry for not answering your question before.
My question is about "Decoding" components outside the region that produced the request, but you already answered me, so thank you.
Wouldn't it be nice if we could mark a component as "SendItInEveryAjaxRequest"?
Does anybody know if something similar is planned to be implemented in a near future?
No.. Just do not use region where it isn't need. Don't you think it will be not a clear case but mess - to process sets of the components additionally to limited subtree. :)