Oh, for the days of simple PC boards.

Here's one we did years ago. I designed the electronics on it, my wife did the layout, and we both did some of the soldering.

The area circled in red is a batch of termination resistors in 0201 (inch) size. That's pretty big by modern cell phone standards, but is the low limit of what I can solder by hand.

0201 = 0.020" x 0.010"