Recommended mileage for shock replacement time 2018

[NGN]

I own a 2018 crew cab 4x4 1500 Silverado with 49,000 miles.
In all my previous owned trucks I would replace all shocks at 50,000 miles, it was relatively cheap and easy to do myself, worth the comfort and piece of mind which I believe help keep my front end parts lasting the high miles I got along with the tires. Well now that this truck has struts up front it will now be a bit more to replace due to needing and alignment along with the new fully packaged sturts which is my understanding. I got one quote for $ 650.00 to do all four corners, a bit of a shell shock for me. I think I'll take on the replacement myself but have no way of doing the alignment which is about $140.00,,, BOOM!!!
So my question is what miles do you all out there think is a time to replace. As I mention I like the comfort and piece of mind but man how the prices changed.
I don't beat my truck, well,,,besides driving on Jersey roads lol.
Thanks for any thoughts
NGN
Nick

[Ziegelsteinfaust]

In my experience time does as much damage to shocks as mileage.

So when you feel they are not to your liking comfort, safety, or performance wise. Replace them

But I would say you have another 4 years pretty easy.

[EVRLET]

I’ve replaced plenty of struts in the 2014-2018 Silverados and you can remove them without affecting alignment.

[NGN]

Looks like I'll doing them myself. Time for the shocking purchase price lol.
Thank you for the replys.

[KShortell]

It may be a bit surreal, but the original shocks on my 2008 built in August 2008 are still good with 71,000 miles on them!

[Boog]

I'll tell you what, the days of $9 shocks are long gone!
I recently looked up rear shocks for my 91 pkup. Cheapest priced ones were $50 a piece.
My gauge for replacement has always been a visual inspection and if the shocks were the least bit wet looking, they are leaking oil and are bad. Another test is if the vehicle bounces more than twice after a dip in the road they were suspect.