I really miss my old Blackberry phones too (Especially the Bold keyboard) but no carrier can bring those back, besides not being compatible with the new network technologies used they wouldn’t want to based on the previous history of year over year lack of sales and market share drain that kept occurring with Blackberry models.

The market drives those changes, and what the majority prefferred were Android & iOS touchscreen devices. Hence the decline in manufacturing and others (like basic, keyboard and Windows devices also). They‘re not going to bring back rotary phones either just because a small percentage of the market prefers things like that.