You can get started with esp32 for $5. Nordic devkits are more expensive, and going past that requires a JTAG programmer, which is an expensive option for hobbyists and students.
It's not surprising that they have taken off like they have. Initially it was because it was inexpensive, but now the community is huge and that is a very attractive selling point.
It's not surprising that they have taken off like they have. Initially it was because it was inexpensive, but now the community is huge and that is a very attractive selling point.