I’ve done it both ways over the years. Initially, it was an ad hoc mismatch based on a very modest budget for mid-fi to entry level hi-fi systems. Frankly, I didn’t know any different back then, and ….with the comparatively modest audio performance capabilities of those earlier budget systems , I doubt that a single array loom of cables would make any big difference in any case,
BUT .,. When I moved into high-end systems with a contemporaneous introduction to high-end cables , …then MY experiences ( emphasis added …,,,) dictate that it does provide a distinct step-up in audio performance to have a same brand AND same model (or better) cables loom.
It’s currently an all-CARDAS CLEAR / CARDAS CLEAR REFLECTION array that superseded an all-NORDOST FREY array.
Budgets matter …it was a piecemeal 2 year migration with all purchases being pre-owned listed on major audio forums. ( mostly CAM…) It was the ICs first, then power cables next, and finally, the speaker cables last.
In fairness, my selection ranking above was actually simple serendipity of available items on the master wishlist just popping up, rather than a rigid plan .
If I was buying new, I would have started with power chords, then ICs, and then speaker cables.
FWIW ..,