Amen brother, for all of us small layout operators, this is the truth!
Is it? It may be your truth, or there could be some misconception
This is a matter of preference for all of us. Nobody has suggested that you must have DCC to enjoy the hobby. That would be silly. OTOH, skewed comparisons on cost or percieved advantages or disadvantages should be clarified for the benefit of anyone considering which way to go.
A crappy job on the conversion of a DC layout do DCC is not an indictment against DCC. It is a great reason to re-wire your layout properly instead of inflicting frustration on your guests. I had a little personal experience on such a layout some years ago. It was not the equipment's fault.
Cost is an even poorer argument. Base systems fine for small layouts are available below $150.00 these days. Basic 2 function decoders can be had for less than $15.00. I always chuckle when I read a post that complains about DCC's cost, then the next line is about converting 250 locos. If you've got the bucks for 250 locos, you've got the bucks for a Powercab or a Zephyr and a few decoders. Model railroaders aren't cheap, we are just selective about what we spend our hobby dollars on.
Is it a standard yet? Depends on your point of view. I'd say for manufacturers it certainly is. With 50% of modelers using it (allowing for errors in the poll), I'd say we're either there or on the cusp. Walthers has data that nearly 50% of modelers still use horn hook couplers (a reason they still supply them with their cars) but we would not say that the Kadee style coupler is not a standard would we?
As for advantages over DC applicable to smaller layouts, YMMV, but here are a few I consider:
1: I like to be able to turn my headlight on and off.
2: If my loco has a Mars or Gyra light, I like to be able to use them at my discretion. Ditto on ditch lights.
3: I like to be able to speed match different locos in a consist, say a GP-7 and an F unit, or a GP-9 and an F-7B by different manufacturers.
4: This one is a biggie: If I have a sound equipped model I want access to ALL of the features I paid for.
5: I like to be able to have other locos parked and not have to worry about throwing switches to route or disconnect power to sidings.
DCC gives you these. DC does not. Others may have more advantages than I listed.
If you're a technophobe, fine. If you don't want to do it, fine. If it isn't for you, fine. But many of the "zealots" as they have been called started out as guys who yelled the loudest that they wanted to stay with DC. Now they are some of it's strongest supporters. I've used both. I find DCC offers more enjoyment without very much cost difference and a bunch more convienence. You pays your money and you makes your choice.