My views broadly
Yes it’s worth storing:
Northern Rhône
Red Burgundy
South African reds
Good Etna
Left bank Bordeaux
Dry Riesling
From anywhere else, anything that is an absolute standout relative to price/vintage/comparable wines at release
Anything else where you have a good reason to really really want to drink that specific wine
No it’s not worth storing (based on personal experience and what’s on brokerage lists and TWS list in copious quantities)
Southern Rhône (I am increasingly realising, except where the last criteria above applies)
Right bank Bordeaux
Aussie Shiraz
Although I don’t go for them - supercharged Tuscan reds
Sauternes - as others have said, it’s cheaper to buy mature on brokerage - very much enjoying 07 Suduiraut at £13/half
No idea about Barolo/Barbaresco