You're missing the point entirely. I'm addressing the question, was the Dreamcast powerful in 1999? Yes. The PS2 clearly had advantages, and it should launching a full year later and costing $100 more.
Was the PS4 Pro underpowered? No, it was the most powerful console when it released. Capice?
Nobody compares a console by the moment of its release, People compare it to its generation.
By that logic the Atari Jaguar was not underpowered for its generation leading into the Saturn and PSX - it came out earlier
and there are a few instances where games like Rayman are as good or better on Jaguar. It doesnt mean it was a powerhouse.
The Sega Dreamcast was 100 bucks less- and did not include a DVD drive. There is the majority of your difference. It also did not have
USB, an optical audio out port, or (excluding the few Bleamcast grey market titles) play PSX games. The gamecube also launched at $199
because it lacked those expensive items.
Price comparatively , time comparatively, however you want to look at it ... for its TIME. and assuming you consider a consoles
time and lifespan to be more than a year (I dont know about you, I dont want to buy a new console every year) then the Dreamcast
was the weakest of its generation, lacked most of the features that defined its generation, and had a somewhat poor run.
None of this is me saying I dont like Dreamcast. I love the thing, I still have one, I think the Dreamcast is one of the COOLEST systems
to release- And it was NEVER about its raw power VS its contemporaries. it has a generational leap over the PSX and N64- Because it IS
a generational leap. Half a decade tends to do that But for its time was it powerful? Not by PC standards looking at raw specs. Not by console
standards looking at its next competition.... and it was about equal to the arcade which is exactly what it was meant to be.... a great way to port arcade
games, And why was Sega USING the Dreamcast (naomi) in the arcade?
Was it because the Naomi was a powerhouse or because it was the best thing you could possibly create in 1998? Unfortunately no. It was because the
arcade was slowly dying, and Sega needed a cheap way to get games into the arcade, cheap hardware, that is ALSO parallel to a home system they
could release the games to without much extra expense- since that was WHAT was killing the arcade market.... a great strategy but not one made
because it offered the absolute pinnacle of performance.