The problem is when it takes way too long. Coinexchange.io has shut all communication so there's no way to follow up or get an update... which btw is a very shady practice.
of all the exchanges that closed due to suspicious hacks or whatever, Coinexchange did it in a probable fairway. they announced the closure several months in advance so everyone had enough time to withdraw coins from there. there were also no additional complications during the withdrawal process.
and this last call for withdrawals is also a good manner, so everyone got another chance. I don't know how long they would have to keep all the services active to keep everyone happy.
Just my opinion about their case.
Problems are bound to exist (e.g. with paswords, 2FA etc..) which is why support should be available always
especially when:
d. You agree that any digital currency not withdrawn by the date given on Closure Notice (or where no application to withdraw has otherwise been submitted) is abandoned as and from that date. For the avoidance of doubt, you relinquish or otherwise release any right, title or claim to such digital currency as and from the withdrawal date set out in the Closure Notice
and hold up, did I miss something? several months? the announcement was published on Oct 1, 2019 and withdrawals were available until Dec 1, 2019 so that's only two months.
Coinexchange.io is Closing Down
01/10/2019
...The website and withdrawals will remain operational until the 1st of December 2019. We ask that you please remove all funds by this date.
note: it's dd/mm/yyyy and not January 10, 2019, see this 18/06/2019 for referenceplus there were users complaining about not being informed via email