I commute about all year long, but not everyday.
I usually don't take the bike when it is raining in the morning (but I have no problem coming back home if it is raining in the evening after work), or when the ground is frozen.
I begun two years ago.
About 4000 km per year. 17 km each way.
I commute with my daily clothes (office job), so this is why i opted for a city ebike, but I plan to use my vintage racing bike during summer too (only by good weather).
I can not take the bike everyday for many reasons, but everytime I take it I feel better.
Morning ride is often difficult, difficult to find motivation, but evening ride is always a pure joy associated with a fantastic feeling of liberty.