The use of 30-year-old technology is perfectly normal in militaries. If you want to criticise the sequel trilogy, criticise it with non-stupid arguments.
The ship and updated stormtrooper designs in the ST are about the ONLY things I don’t have a criticism for in the ST.
The X-Wings aren’t the precise same design as the OT so they’re like the F-35 vs. an F-16; both are still pretty “plane-shaped.”
Also on the tech side, my favorite part of The Mandolorian was actually seeing the TIE Fighter land... of course it makes perfect sense the radiator fins folded down and actual landing gear would be in the underside hatches.*
And while TLJ’s hyperspace ram was awful, the technical explanation of how ray shielding works (i.e. why capital ships have to slug it out at close range because at greater distances their shields basically make them invulnerable to weapon fire and why starfighters are needed since they can fly right through the ray shields to deal damage to weapons and ray shield generators) was lore gold.
* TIE Fighters get a very bum rap and most of it can be laid at the feet of WEG; who were the sources of the TIEs have no shields, ejection seats, landing gear or even life support and the “wings” are solar panels and those got carried over into the EU by way of Zahn using RPG material to flesh out his Trilogy that basically put the EU on the map in the early 90s.
The actual TIE Fighters had shields (you can see “shield flashes” around TIEs during ANH), ejection seats (seen in a blink and you’ll miss it in ESB), landing gear and life support (The Mandolorian; the pilots in the OT have full helmets for the same reason OUR pilots wear oxygen masks while flying despite having pressurized cabins... redundancy).
The ONLY things they lacked relative to X-Wings were hyperdrives and torpedoes; neither of which are particularly useful for anti-starfighter interceptors... but then the Empire has the resources to produce dedicated weapon platforms like interceptors and bombers and long range strike fighters like Vader’s while the Rebels put their limited resources into hit-and-fade multi-role starfighters.
I have a great deal of respect for the gearheads behind the tech that’s showed up in the live action material. It’s not their fault Kathleen Kennedy had woke blinders on and put their stuff into crap stories.