Imaro
Legend
3.5 IS compatible with 3.0.
However, let's do a history check here. 3.5 was -marketed- as a replacement for 3.0. It was marketed as a complete revision of the product line.
In fact, the books even say 'revised edition' on them.
3.5 WAS being sold as... well the .5 of 3ed edition. Wziards did not attempt any duplicity in that manner, they said flat out, they're putting out a revised edition, and future material will be based solely on that revised edition, and not 3.0.
Essentials is not.
I hear a lot of 'the sky is falling' but I don't see any -evidence- of it. Instead I see people going 'Companies lie all the time! So therefore when Wizards says it is not a complete revision it must therefore be a complete revision!' based on the fact that years before 3.5 came out they said to someone internally that 3.5 wouldn't be a revision....
...meaning you're being paranoid and not logical.
When Wizards wants to release 4.5, you will KNOW it because they'll probably call it 4.5, and they'll announce it a year in advance and start showcasing it at conventions and begin marketting hype.... exactly like they always have done because they are a successful company and such things lead to successful launches of flagship products.
Hell, Dark Sun's getting more of that treatment than Essentials... maybe Dark Sun is 4.5!
Oh, wait, Magic the Gathering's latest set has more hype than Essentials, maybe Magic the Gathering's 4.5!
Rubbish arguments. Come with something other than fear and loathing... something -substantial-, something -concrete-. Some piece of marketing we can look at and go 'yes, that DOES sound like it.' Your collective paranoia is NOT evidence of anything more than an opportunity to make it big in the tinfoil hat business.
Would you happen to have a citation where anyone from WotC said essentials is definitely not a revision, because I haven't seen this. The only thing I've seen is that "essentials" will be compatible with older books.
As far as 3.0 to 3.5 marketing... yeah, I'm sure one of the lessons they learned was that the way the change was marketed didn't go over very well.