A lot of it was lightweight enough that archival sites etc might not have specifically ruled them out, aside from specific efforts to preserve Flash material. There are also modded versions of Flash Player and emulators that can still play SWFs, and FLV remains supported fairly commonly.
Nah, I’d happily have one - some people are very picky and reluctant to try new things, and aren’t always even aware of it.
Since you’re asking for feedback, though, my first impression is that the cream cheese is not bad, but may be redundant - the avocado is already covering you on fat and creaminess. The cream cheese I know doesn’t seem like it would add anything. The dish probably needs acidity, but cream cheese is too mild. I don’t recognize your lentil bread, but this should work on anything that can go crispy, since the rest is soft and creamy.
How about mixing citrus juice into the avo, or just going full guac? I would switch the dairy from cheese to maybe some sour cream/Latin-style crema/yoghurt drizzled over top - or making it a hard cheese like parmesan or pecorino. You can also use citrus zest for both flavor and garnish.