Samsung What is the probability?

I doubt anyone here would know. SamMobile has a forum that you might get more feedback from. I'm with you on these two issues. I've been loyal to Samsung for my last 5 or more phones. Not having that option on my next (hopefully the Note5 coming by EOY) will be a "real downer." Unfortunately, all the brands seem to be going that way. Although it is a pain in the posterior, as far as batteries go, this product has helped in a pinch. And as far as auxiliary memory, one of these coupled with a micro-SD, SD, or USB drive provides backup. I know neither solution is optimal, but it is at least a solution that can help when memory or power are in short demand.

I have both the OTG adapter along with USB to SD/Micro-SD adapter, and also the external battery pack. All products work well with my Note3 and Note Pro 12.2.

 

Removable batteries will be a thing of the past - integrated batteries help make the phone lighter & take up less space that can be used to make the faster, better phone.
Hopefully the expandable memory issue will only be for a few generations until the manufacturers realize that is not what their consumers want (so we have to speak up and with our wallets).