You know, I think I am rather living in the past. I have never used matrix metering, it's just never crossed my mind. Starting in my days of film I have always used centre-weighted metering and rather ignored the modern metering systems as 'better the devil you know' kinda thing. I am getting a grey card just in case (I really can't justify a light meter) and when I go on my 'landscaping' activities soon, the first thing I shall try is a comparison between matrix metering and grey-card light metering. It will be an interesting exercise.
Note to self: Read more of the f'in' manual!
Light meters are something I have been looking at a lot lately. My daughter started using film, and I started again as there was interest, and my son wanted to try too.
She asked me what settings to use, so I said try 125 at f8, and she asked how I knew. My answer was that it looked like that, which didn't really help her

Then I bought some inexpensive selenium light meters, Of course they all give a different reading, mostly within 1 stop of each other, but not often that close if comparing the readings to what the G9 or GX9 says.
Then I remembered I had a flash meter (I gave away most of my flashes, stands etc several yeras ago), and although it is called a Flashmate L-308S it is really an ordinary light meter! I guess I shouldn't have been surprised, really, just never needed it for that, so I compared the old ones with that. The closest are a couple of Leningrad 4s, which for reflected light are also surprisingly close to the cameras choice. (tilting the light meter down if there is bright sky)
We have now decided on which light meter each of us wants to use, then do some tests and see how the results compare, and if there is a definite trend, adjust the ASA setting on the meter so that the suggested settings are near correct.
Bit like have several clocks, which one is right
The Leningrad 4 is quite a nice meter, has two ranges, 8-14 and 1-8 selected by a slider on the side, better that a flap on the front then having to remember which pointer to use, paid well under £10 including postage for each, did check they had the incident light "filter" before buying though.