[TF-TSC] Extending the support window of TF-A LTS?

Hi all,

At Google, we are now promising 7 years of support for Pixel devices https://store.google.com/intl/en/ideas/articles/newest-pixel-updates/. We therefore wonder what it would take to increase the LTS maintenance lifetime to 7 years (from, I believe 5): resources, project planning, other things? Can we put this on the agenda for the next board meeting?