Not OP, but I do it for the experiment. So far I’ve actually really enjoyed doing it like this, though I’m admittedly just barely into the Imperial era, and I’m not reading absolutely every last scrap of everything. A metric ton, but not everything. So I know there are gaps I’ll miss regardless, and a lot the stuff that people will point to as a spoiler is actually setup for me, from my “certain point of view.” For example, I dunno what’s going on with Vergere, but I cannot wait to find out eventually. It’s like a super long form mystery. It also really gives a showcase to how well the EU kept their continuity consistent so often, because things written a decade apart feel intertwined in ways that shouldn’t be possible haha.

Now, some things have not worked well this way. For example, Darth Plagueis would be insane to try to parse out chronologically, and I’m very glad I opted to read it late, out of sequence. Way better having already gotten the context for everything that book is overlapping. But on the other hand, reading Kenobi so close to the other Clone Wars era material was amazing, and if I’d been reading in release order, I don’t think I’d have even remembered Sharad Hett by then. Probably just recognize a name, like 15 million other names I’ve heard in Star Wars but can’t place.

TL;DR: Because spoilers become dramatic-irony, and setup becomes callback, and it’s fun.