What models use "HP-48 style" enter?

[Dave Britten]

(03-10-2020 04:00 PM)Orome Wrote:  Any thoughts on the reasons for the switch to that behavior, and then back to the "old" behavior?

Because the 35S wasn't RPL. It was the old 4-level RPN stack (and ENTER behavior) like the 33S and 32SII it succeeded. The 12C and 17B also stuck with the older RPN, despite still being in production long after the 28 and 48 came out. It's just two different styles with differing levels of complexity in usage, and they both have their target audiences.