Yes, it’s frivolous. Yes, I bought myself a big hooded robe. No regrets, except that it needs a little longer cord so that you can wrap it around further.
With heating prices going up, warm loungewear and sleepwear is pretty important. You’re going to need wool socks, fuzzy slippers, et al.
That said, I’m still horribly envious of the elaborate dressing gown that Lindybeige showed off on his channel. There are some things that are just not easy to buy in the United States, and that’s one of those things. If he sewed it himself, I’m even more envious.