With a solid rhythm track, the other instrumentalists will feel comfortable playing along to the recording at their home studio. This is why I hire excellent guitarists such as Steve C., J. C. Carman, Mike Flanders, or Ben Deberry to record the rhythm tracks. They've got to be right on!
Instruments that get added on may include lead guitar, B3 organ, piano, slide guitar, pedal steel, banjo, or dobro. I've even added a few chords on my "open D" tuned acoustic for depth. I should add that during the process of instrumentalists recording in their home studio, they will often record two or three takes, which allows me to edit in parts from all of their takes to make one solid track. This is one of the ways I can make sure the final recording sounds as if we've played the song together on stage hundreds of times!
Once recording is finished, Mikie mixes the song, and then the two of us will make minor adjustments - a little less vocal here, a little more guitar there.
I have to say again - "everything happens for a reason". Even though I've been frustrated at the virus slowing down the process, I've made important changes to the existing recordings during this delay that have done nothing but make them better. I'm a bit of a perfectionist, but the final result makes it all the more rewarding and worthwhile...