does oil-based chain lue deteriorate after long periods (months) of

[Catagory6]

non-use?
bike has been inside the house all winter, above 65 degrees F

[mattr]

Depends, some oils will dry out, the lighter fractions evaporate leaving a gummy/waxy residue.

Some don't. I've not tried leaving many oils on a chain for months.

You'll also accumulate dust.

[AJS914]

Just relube, wipe down the chain and then go ride. You don't have to over think this.