300MB email account is puny by all modern standards
I don’t think 300MB per email account is puny. In fact, it’s probably average. People compare it to Google or Yahoo or other providers who are dealing with massively high volumes. But your average ISP isn’t dealing with millions of users. They may be dealing with a few thousand users at most, which is a totally different paradigm. But if you get rid of the idea of using your email as secondary file storage and just think of using it for email. 300MB stores a lot of data. For example, my current Google account has just over 600MB of data. BUT!!! That has email coming in from five of my more active email accounts (yes, I have about 12 email accounts). With that, Google is storing well over 60,000 email messages and attachments.
The point is, a single email account for a high volume email users could take years to use up 300MB of storage. If the average email user gets 30 messages a day, 900 messages a month (which is probably slightly on the high side), without attachments, thats about 11,000 messages a year or about 11MB per year without attachments. 300MB will store close to 250,000 messages, with a variety of attachments between 100kb-2MB. This all assumes removal of spam on the regular basis. Plus more people still use POP over IMAP. And while that will eventually change, it does mean that most people are cleaning out the storage space at least once a week or so.
I know people do it, but sending large files via email, regardless if its Google, just isn’t a great idea. Lord knows enough of my clients attempt to do it; but luckily most don’t even have the patience to send a 30MB file, let alone a 100MB file.
I’d be more concern with number of emails, than size of individual accounts.
Plus with the move towards more decentralized services, if you need more than average, you can still get a basic account, have your photos stored at Flickr, your videos at YouTube, and route your email into Google.