It's funny because I woke up with a plan to go get this myself
Been a while since I took the old Asp Explorer for a drive. Apparently I'd stripped it of all upgrades so had to shuffle in a proper FSD and do some light engineering, but she soon ended up with 62ly range and a surprisingly nippy set of thrusters.
Arrival at the destination planet was a little annoying, since there was a tourist beacon set up for the ruins; about 1500km away from the actual ruins. Took a fair bit of hunting to remember that the thing I wanted would be in the navigation points list rather than contacts, but eventually it was just a short hop around the planet.
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Cue one of the more ridiculous game loops in Elite Dangerous. Circle these 4 obelisks, log out, log in, repeat. Because the tech broker wants 16 of two types of scan, and they only give 1-2 each of a random type. Frankly there is no excuse for this, it's stupid. Either the obelisks should give 8x more, or broker's prices should be cut by a factor of 8, or there should be many, many more guardian ruins sites, on actually interesting planets that are fun to visit and the relog reset should be given a cooldown that is higher than the travel time between them.
Why not send players to atmospheric worlds with twin suns, rings, or gas giant parent bodies? This is a chance to select the prettiest worlds outside the bubble, and it irks me that in all this time FDev have never bothered to hand-plant 20-30 more sites. Literally, just say that there's a minor improvement to scanning tech and some new sites have started being spotted to let players know they should go check out nearby systems again.
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Anyway, enough grumbling. I only needed obelisk scans because I had a fair stock of physical materials from... probably before Odyssey. After about 20 mins I had enough for the two items I wanted; hull reinforcements and guardian power plant. The latter because I quite fancy sticking one in a vulture to see what it does.
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Honestly, the sites aren't bad places to visit, but imagine how much cooler they would be with an atmosphere and an interesting sky. And imagine if there were 4-5 on each planet so we could pick one that's in daylight instead of having a 50/50 chance of doing the whole thing in the dark.
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But yes, 2x class 5 guardian hull reinforcements now fitted to my Cutter

It has actually dropped about 10% hull points, I guess I will find out whether it was worth the trade next time I get hit with a caustic attack. It has occurred to me that there may be a lot of difference between my casual 2 modules, and a full hull tank with 8-10, depending on whether the caustic resistances stack.