A recent arXiv preprint (v1, 15 May 2026) by Juan M. Cornejo and colleagues analyzes a route to 10^-17-level comparisons of vibrational frequencies between H2+ and its antimatter counterpart anti-H2- inside Penning traps. This is a theoretical proposal, not an experimental result, with no sample size or empirical data; it relies on detailed modeling of trap dynamics, laser interactions, and readout schemes rather than measured outcomes. The work extends Myers' 2018 suggestion of non-destructive laser spectroscopy by incorporating either the continuous Stern-Gerlach effect or quantum-logic spectroscopy for state detection. While the authors rightly highlight that most required technology already exists in labs such as BASE and ALPHA, they understate the production bottleneck for anti-H2- ions, which has never been demonstrated at the densities needed for repeated measurements. Complementary CPT probes already running in the same infrastructure—electron/positron g-factor comparisons via electron spin resonance and proton/antiproton magnetic-moment tests via radiofrequency drives—could be performed in parallel, creating a multi-channel consistency check that single antihydrogen experiments lack. Key limitations include assumed trap stability at the 10^-18 level and negligible blackbody shifts that will require cryogenic upgrades beyond current BASE setups. Real-world precedents from the 2022 BASE proton g-factor result (Nature 601, 53) and 2023 ALPHA antihydrogen spectroscopy (Nature 621, 516) show that systematic uncertainties often exceed initial projections by an order of magnitude once data taking begins.