Some trivia I came across: Phil Katz (of PKZIP) wrote a Wheel of Fortune game in BASIC, around 1983. Can load that from tape.
Also notes on using another PC as the “tape recorder”, or a smart phone . And also a list of .COM programs that I’ve successfully saved back to tape (using Bogan’s updated version of 5150CAXX)
There are few other IBM 5150 related articles near there – such as using 4x disk drives, using a WiModem, and notes on why I like DR-DOS the best
For offline BASIC development, Rob Hagemans’ PC-BASIC — note-perfect GW-BASIC emulation in Python — supports reading and writing to the virtual CAS1 device via WAV and CAS bit-dump files.