This laptop boots with the spinfinity plymouth theme, and there's a white
progress indication bar at the bottom of the display, progressing from left
to right, during the boot.
That other laptop, over there, also boots with the spinfinity plymouth
theme, but there is no progress bar. Spinfinity just spins on its own, and
that's the only thing that happens, until the desktop comes up.
I compared the plymouth packages on the two laptops. The only difference is
that the first laptop has plymouth-theme-solar theme installed, in addition
to spinfinity; and all other plymouth packages are the same.
I'll try installing the solar theme on the other laptop, but I can't see
that making a difference. The absence of the progress bar, on the 2nd
laptop, is a Scooby-Doo mystery to me.