Please consider this MWE:
%%% SNIPPET BEGINS
\version "2.24.4"
\new Staff <<
\new Voice = "first"
\relative c''' { \voiceOne e2 ( d2) }
\new Voice = "second"
\relative c''' { \voiceTwo b1 }
>>
%%% SNIPPET ENDS
The ledger line immediately above the whole-note B note head looks strange
to me. It appears to take the width from the E above it, so it is narrower
than the lowest ledger line. If I change e2 to e1 then the ledger lines
look right to my eyes (all the same width).
Is LilyPond’s behaviour — to have ledger lines of different widths at the
same moment (in the same vertical column, within a single staff) — in line
with best engraving practices?