bug#57505: 29.0.50; Is loading seq.el before using it necessary?

[Arash Esbati]

Hi all,

doc/lispref/sequences.texi says this starting in line 448:

    The @file{seq.el} library provides the following additional sequence
  manipulation macros and functions, prefixed with @code{seq-}.  To use
  them, you must first load the @file{seq} library.

Is the last sentence (still?) true?  I'm not really familiar with Emacs'
startup process, but seq.el seems to be preloaded, so require'ing it
isn't necessary.  Or am I missing something?

Best, Arash