I'm actually pretty confident that things will go back to full time from home within the next 6 months, whilst the company finds its feet and realises IT people can do their job from just about anywhere with an internet connection. I live in hope!
I wouldn't hold your breath. I went through multiple cycles of home working being encouraged / banned / tolerated, depending on what was highest on the 'political' agenda at the time! The practicality of it was never in doubt.