You asserting something is in "completely untrue" without explaining why is pretty crap argumentation, mate.
I did explain it, in the very next post, including the actual adventure being discussed, by showing it actually came with a doom clock attached RAW.
And your "how is altering the adventure by making the clock specific 'altering the adventure'?!?!!" is pretty funny
Except that's not what I said mate. I said making the clock specific to the adventure doesn't
DRASTICALY alter the adventure.
By adapting the hook to some relevant doom clock (or temporal constraint) you are far from
drastically altering the adventure, and my point (that pretty much every adventure ever written ever has some hook that can be framed in a doom clock or similar) stands.
Remember - you were arguing 'older adventures dont lend themselves to Doom clocks'.
I countered with literally every single part of 3.5's Age of Worms campaign, several Pathfinder modules (Kobold king etc) and the C series of AD&D modules (specifically Lost island of Castanamir, White Plume Mountain, Tomb of Horrors), all of which I have run and all of which had easy to implement Doom clocks that tied directly into the hook and did not in any way drastically alter the adventure.
Basically you arguing for a One True Way-ist approach
I did the exact opposite. I advocate for temporal pressures for several reasons (namely 5E's resource management system model, and the added verisimilitude and pacing advantage it grants to stories, while also giving the PCs the feeling of affecting the world), but Im not arguing 'you must do it or else'.
If you want to run single encounter adventuring days of Deadly++++ encounters, and it works at your table, go nuts. Im not stopping you or saying 'you're wrong'.
Personally I would find rocket tag campaigns like that boring as hell, and the balance problems would also make me avoid such a game.
I'm simply saying:
1) There is another way other than rocket tag,
2) The other way (temporal constraints and doom clocks) make for an overall better 5E experience for me, and
3) It can be easily implemented, even in modules from 1st-4th edition, and from 3PP and other systems.
If you disagree with any of those points, have at it. Otherwise please stop putting words in my mouth that arent there.