So this is one thing I should have made more clear. Let's say that the steem network has a 100GB bandwidth and 100 users. Those 100 users get a portion of the 100GBs allotted to them based on the amount of SP they all have. If everyone is on at the same time the user with the lowest SP and in turn the lowest bandwidth may find themselves 'locked out'. This especially happens when the account is new and has a zero bandwidth average from the past week.

It's tricky but the short answer is no. Bandwidth will not recover as long as there are a lot of users online. As other users hop off the network more bandwidth is freed and the then 'locked out' users will find that they are able to transact agian.

I hope I answered your question. I am still studying the white paper myself and it's not as easy as it seems.