You make it sound like it was Apple's idea to "throw out the trash". Motorola saw no future in trying to expand its line of CISC processors, the 68xxx family and instead developed a new RISC processor, the "G" family. The 68xxx family is still alive and well, mostly in embedded applications. Another interesting point. It is the base processor family for what is really the Most Used Computer Operating System. Hint, its not Windows or Mac O/S, or any flavor of Unix, but you will find it under your hood.
It was for software.
Motorola saw no future in trying to expand its line of CISC processors, the 68xxx family and instead developed a new RISC processor, the "G" family.
I know I'm getting a bit anal here, but... The switch from 680x0 did not go straight to "G" machines, which is only a marketing term. It began in 1991 when Apple, Motorola and IBM made their agreement to make the PowerPC processors based on IBM's POWER architecture. Apple shipped their first Power Macs based on the PPC 601 in 1994 (the 6100/60, 7100/66, and 8100/80), starting the 680x0 drop. The "G" wasn't introduced until 1997 with the G3, based on the PPC 750.
BTW, I also had a 680x0 machine, and Atari 1040 STF with 1MB RAM and a 68000 processor.