The funny thing about the 1000's lineage: Initially the PCjr compatibility was supposed to be a big selling point. However, when the PCjr tanked, it became a liability, so Radio Shack switched the advertising to play up its "MS-DOS compatibility" instead.
Getting back to adventure games (albeit of poorer quality than Ron Gilbert's): Apparently the Tandy's success saved Sierra from some serious trouble, as they had primarily targeted the PCjr platform for the King's Quest series.
Yeah but once VGA/SVGA and Adlib/SoundBlastaer cards came out, it broke the Tandy 1000 series.
Still early games like Bard's Tale 1 played better on the Tandy 1000 than an IBM PC Clone with Monochrome/CGA and the PC Speaker beeping.
I had a friend with an IBM PCJr, had to do some work to get it over 512K by modifying some expansion packs, and the PCJr also had a cartridge slot.
I think the PCJr was aimed at home use to fight Commodore and Atari, then Apple entered with the Apple //c to enter the home market. Eventually Atari and Commodore won the home computer wars with cheaper systems that got upgraded ala cart. When the Atari ST and Commodore Amiga came out both Commodore and Atari had switched management but lost to Microsoft and Windows on PC Clones with VGA/SVGA and Adlib/Soundblaster cards. Windows 95/98 was the final nail in the coffin.
Getting back to adventure games (albeit of poorer quality than Ron Gilbert's): Apparently the Tandy's success saved Sierra from some serious trouble, as they had primarily targeted the PCjr platform for the King's Quest series.