I often play older games with the maximum possible graphics *me takes a look at my pile of shame*.
Whenever the game supports it, I use multisampling antialiasing with transparency AA, which means no disturbance on e.g. foliage. In other words, no need for image smoothing afterward.
Later games have deferred renderers (DX10+ era), which means that MSAA is no longer supported except for a few nv-inspector tricks.
There were games without AA at all until post-processing AA was introduced, FXAA→SMAA.
Later, temporal enhancement of the image was added with TAA (software) -> DLSS/FSR/XESS (hardware).
What still works though, as it is applied to the whole image, is supersampling antialiasing. If MSAA is supported, then SGSSAA provides pretty much the best picture quality. If it is not supported, there is still the general activation via a higher game resolution, which is then downsampled to the monitor resolution: DSR(nVidia), VSR(AMD)
Due to different LOD systems in engines, this usually also increases the render range of clutter.
Built in supersampling: Some games, often from Ubisoft Franchise (or World of Warcraft), have a slider to set the resolution at 200%, which makes things a lot easier.
Todays post processing AA:
Allowing artifacts due to missing subsampling (no MSAA/TrAA) and covering these up again by interpolating intermediate images and/or guessing images using machine learning (the object looked like this yesterday) is not really a solution for me.
→ i love native with downsampling
Frame Generation is also fine, I don't need crazy low latencies.
PS:
DL
AA from a marketing perspective the name suggests ordinary AA, although it offers better quality (input = output) than
DL
SS, which is a great marketing name, as it suggests supersampling (downsampling), but sadly it is the opposite → upsampling (input < output)
Unfortunately,
DLDSR only uses the original spatial DLSS 1.x, which is worse than the later developed FSR 1.x
In a situation where I require this, I would prefer downsampling with in game FSR or DLSS at highest quality setting over DLDSR to calm the bushes. (downsampling+DLAA for example)
PPS: I am only writing my opinion here. The techniques of the last 15 years are described from memory and may not be chronologically correct.