Using old 5W iPhone 5 Power Adapter to charge new iPhone XR?

I would like to know if it is safe to use an "old" 5W Power Adapter (charging brick) from an iPhone 5 to charge my new iPhone XR. I'm specifically referring to the original (and, of course, genuine) charging brick that my old iPhone 5 included in the box.

Yeah, I know that my new iPhone XR already includes a cable and a 5W Power Adapter… However, I would like to have two chargers (one at my work and the other one at home).

I would definitely need to purchase a new lightning cable… But, my question is… Is it necessary to purchase a new charging brick? Could the "old" charging brick damage my new phone (since it is too old)? It seems to work fine. It worked perfectly with my iPhone 5, but I'm not sure if I should use it on my iPhone XR.

I know that this question may seem stupid, but I prefer to play it safe. Thanks everyone and sorry about my English (my first language is Spanish).

Why do people still like and listen to The Beatles?

I can understand why they would be popular during their time in the 60s. They were new then.

But why do young people revere them so much? There were so many other amazing bands that came after them who's music still sounds fresh.

Saying the Beatles were the best band ever is like prefering to use the very first Iphone in 2018 instead of the latest one.

I don't like old grandpa music. The oldest music I would prefer listening to is Guns n Roses.

Added (1). I think people are just brainwashed to like the Beatles because the media keeps telling them that they're ''important''and everybody ''should'' like them.

Can I swap my phone?

A couple of months ago I took my iPhone 6 back to car phone warehouse because it had a battery problem, this had happened with iPhone SE two times before so I expected them to just replace the phone, but instead they said "would you like an early upgrade" and my dad said "yes we may as well" and they paid £50 of the phone because of the fault which was nice. They said that they would upgrade me to an iPhone 7 which was great, but it was so expensive for a monthly contract, around £50 a month and £80 upfront and my dad didn't want to pay that much. So they asked about the iPhone 6s which was really the only choice af that time which was £80 and £34 which is still a fair amount of money when online it was around £20 a month with no upfront cost. On their website and iPhone 8 is the same price as my 6s and I feel like it's really not worth the money whatsoever. Is there any chance we can actually change it for a phone that is worth the money because they somewhat scammed us?