Do overlanding mods actually hurt resale value or is that just something people say

Looking at dropping serious money on solar setup and better suspension but everyone keeps telling me I'm gonna lose money when I sell the truck. Like modifications automatically make it worth less…

But I see built rigs selling for way more than stock all the time. Seems like the right mods actually increase value if they're quality stuff that people want. Nobody's gonna pay extra for a stock truck when they can get one with thousands in upgrades already done.

Is this just something people repeat without knowing or do overlanding mods genuinely make resale? Because I'm having trouble believing a solar power system and quality suspension makes my truck less valuable than a bone stock one with nothing.

What's the reality here from people who've sold modified trucks?