You're welcome to continue living in the 2013 timeline that Wi-Fi 5 was made available to the world.
Recommending Wi-Fi 5 products today while ignoring the benefits Wi-Fi 6 (
and the new baby Wi-Fi 6E) offers is just hiding your head in the technological sand. All 'classes' of Wi-Fi can be headaches, depending on the network environment. Older tech won't magically cure anything. And in many cases, it makes matters worse too (being a shared medium, the faster things happen the less congestion possible too).
Wi-Fi is nowhere near 'mature and stable' enough,
yet.
Any version of it. If it were, these boards would not exist. Wi-Fi is always in a continually evolving state where your best bet is to match the available hardware to your current client devices, network needs, network (Wi-Fi) environment, and budget.
What the latest standards do though, is give the varied devices most of us have on our networks the best chance today to use them as fully as possible with the least issues.
It has taken a long time for Wi-Fi 6 to become a viable alternative to Wi-Fi 5. But that day has long been passed.
Is Wi-Fi 6 Worth It
In 2024, I do not care what number of Wi-Fi we're on. I just hope to see the same kind of improvements then too from where we are today. If 5G is anything to strive towards, Wi-Fi is due for a re-imagining very soon, if it is to remain competitive at any level. That kind of carrot-on-a-stick is what allows me to 'know' that Wi-Fi never stands still. Even when all or the majority of your client devices are on the previous wireless 'class', the new routers still offer improvements for them too (as the articles by
@thiggins have shown).
Any network, regardless of ISP paid for speeds, sees an improvement on AX class equipment today. My customers tell me so and I see it in my own network too. Whether that is worth it for you, or if you can even appreciate the benefits it offers is another story.
The best part of 'AX class equipment' is that today it is available for the same or less (with sales, etc.) than the outdated and inferior AC class 'kings' of yesterday. To those that want the best wireless possible.
Of course, that is not to say to throw out perfectly good/working equipment to get the latest and greatest. Rather, if buying network equipment today, buying old tech is less rational than it may first seem. Particularly when the amount of money spent is the same. Buying old technology is the equivalent of insurance without the need for it in the first place.
In the end, there is only one call to make. Either the new tech enhances your network, or it doesn't. But sticking with just the old tech, you will never know.