The vertical aliment of the |-> does not look right to me in the pngs

To my eyes, the Computer Modern one looks fine. The stix is a bit low, but the minus sign is a bit low in that font anyway. It doesn't look and odd in the context of more stuff.

yeah, cm looks right to me, the other pngs don't seem right. The vertical extent of the | doesn't match the extent of the bracket, and they aren't aligned. Are they supposed to or not? In cm, the vertical bar doesn't match the vertical extent, but it seems to be better aligned.

I think the - should be even with the center of the > . Below is the output from

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\thispagestyle{empty}
\begin{math}
  \left\langle - \right| \left | + \right\rangle
\end{math}
\end{document}

I am wearing my physicist hat here complaining about this.

This PR is definitily an improvement and if the answer is 'use tex' to get the more centered version that is probably ok.

Fixing this properly has turned into a rather deep wormhole of problems... I say we just keep this open and I (or some other brave soul) can continue to hack away at it as able...

#3374 was fixed by #5871.
Vertical alignment of +/- and brakets remains less than perfect, but this PR doesn't change that situation AFAICT, so I'll close this.