Mobile version of the site - 2 options, which one to choose?

Question

Mobile development

Hello. I started adapting the site for mobile phones... I ran into a problem, help me choose...
Now there are basically 2 ways to adjust the site for mobile phones:
1 - on a subdomain (m.site.ru)
2 - adaptation.
I decided to go the first way and make a mob. version on the sub-domain (since I can do it myself), I started reading the info, they write that, I quote:

Mob. subdomain version - last century

Perhaps ... But besides "antiquity", does it have significant disadvantages before adaptation? Or not?
I just looked through the giants of different topics, such as vk, YouTube, softportal, top adult tubes, ask.ru and so on - everything is on m.domen.ru smile :)
And in general, if the cognac is old, it doesn’t mean bad .. .

I’ll add from myself:
Pros of a subdomain:
-cheaper
-easier
Minus - edits on two sites (but you can also use 1 database)
Pros of adaptation:
- new
Cons:
- more expensive
- more difficult (in my case for sure)

So what do you guys recommend? Do not listen to anyone and continue, or do you still pay attention to adaptation? If so, I would like to know what exactly it is better?

Answer 1

Here's the plus of a subdomain - pictures (in size) are easier to adapt. Also, in the adapted version, there are often elements that are not displayed on mobile, but are loaded into the page.

Answer 2

Whatever is easier for you, do it. You don't have to listen to advice.

Answer 3

If the site is not easy to change, you will have to hide many elements, etc. then, of course, better on a subdomain. If initially the page has at least some tendency to adapt, then adapt it.
In the first case, you will be able to "lighten" the code and images.

Answer 4

I'm leaning towards the adaptive version, maybe I'm wrong, but there should be advantages in terms of indexing than using the main + mobile versions
in the future, it will be easier for you to maintain an adaptive version of the site, change extensions than to make synchronous changes to two versions of the site at
once faced with the difficulties of switching to the adaptive version, it seemed that the sites were complex and poorly adaptable, but gradually a similar adaptive version was developed somehow.
Difficulties seem only from the fact that perhaps you did not do this much and often. Although it is possible that something will have to be sacrificed.