Frankly, your stance on edition naming is bonkers and unmoored from reality. There are countless things where different editions of a thing with the same name are incompatible. Yeah, you can have that opinion, but please stop derailing threads with it. People are not gonna agree with you.
Some other games where that kind of incompatibility is present:
Traveller: The New Era was a different engine (well, distantly related engine to be totally pedantic) from Classic Traveller and MegaTraveller. T4 is a redesign from first principles of Classic, but was as incompatible with CT/MT as it was from TNE (its immediate predecessor).
Gamma World used the Marvel Super Heroes color table engine for one edition, an AD&D derivative for several, and was itself a merely semi-compatible follow-on to
Metamorphosis Alpha. Then there's the D&D 4e version of it. And the completely-a-port
Metamorphosis Alpha to Omega (Amazing Engine).
Arrowflight - 1st ed was a d6 count successes dice pool; 2nd is a 2d6 ≤ stat+skill; 3rd is supposedly also the 2d6 version
And more GDW... Twilight 2000 1e was a 3 difficulty percentile system (1d100≤ skill × diffMod), using 3d6 stats; Twilight 2000 2.0e was a 1d10 system with 2d6 stats and the same 3 difficulties (and a fourth for combat only) (1d10 ≤ skill × Diffmod); Twilight 2000 2.2e looks just like 2.0 unless you read in detail, and is 1d20 with 5 difficulties (1d20 ≤ (stat+Skill)×diffmod), T2013 (aka T2k 3.0) was skill d20's; T2K 4e is Year Zero Engine Step Die version (atts d6/d8/d10/d12, skills same, count successes.) They're the same only in name and setting conceits; 2.0 and 2.2 use the same char gen and mostly the same combat (except autofire).
And that's not counting games licensing non-gaming IP...
Dragonlance - AD&D for the 1st edition; The SAGA System (not to be confused with SWSE) doing Card Based play in DL5A, then a d20 port of some description that I didn't bother with.
Marvel: 3 color-table versions (MSH, Revised MSH, MSH Advanced Set), SAGA System (as DL5A, but actually changes the core mechanics a good bit, and different deck even), The Marvel Universe edition, and now the System 616 Marvel Multiverse using a 3d6 engine.
Star Wars had 3 WEG editions (1.0, 2.0 2.1 aka 2R&E) with some notable differences). 3 d20 editions (d20 and d20 revised, then SWSE) with the third of those (SWSE) being essentially the prototype for D&D 4e... and much loved... plus one FFG edition which is now (due to Asmodee «bleep»ery) republished by Edge Studios.
Star Trek had 2 Fasa Editions... highly compatible those two; percentile attributes and percentile skills, lifepath char gen. Then the LUG version, wholly new system with different stat range (1-5 for PCs) and similar skill range (0-5), a different kind of lifepath char gen. Then the Decipher version (2d6 stats, 2d6 skill checks with skills in a 0-10 range and a stat mod), now Star Trek Adventures (2d20 to 5d20 < Stat+skill) with yet another different lifepath system, and an optional point build and even build-in-play.