Your comment makes sense. I was also wondering that Apple has not much choice here when it comes to MBA. My speculation is: they may release an update for MBA but it'll be a minor update because they can't update much in terms of hardware otherwise they will have to increase the price and the point is they can't increase the price otherwise the premise behind the concept of MBA will be gone and students or people who buy MBA because it is MBA not a high end pricey pro machine can't buy it. Does it make sense?
Just speculation on my part (but based on my experience in this field), but one possible reason why Apple keeps the MBA around is to "shore up" the price of the rMB and MBP. Without the MBA, there would be market pressure to drop the prices on the rMB and MBP. That would undo the work that Apple did to INCREASE the price on the MBP by providing some models with the touchbar at higher prices.
IMO the MBA will be safe from being discontinued until Apple can get profit margins up on the other macbooks to compensation for having to lower the price on those.
1. I actually do not have any concern with 4k. All I want to render is 1080p video, hope you're also doing the same (and not 720p isn't?)
2. Would you please tell me how much time your MBA (2014 11" MBA 4G/128GB) takes to render a 5 mins video?
3. Which software do you use iMovie or Final Cut Pro? If you use FCP then how much HDD space is left?
Do you use any effect or just use the raw footage (I won't ask to share your YT video link but if you'd like then it's be great and I will have much better understanding)?
I am so grateful to you for answering my question, it's great help and also it'll be much helpful to others in the world who are in the same situation
Here are some answers, generally speaking because I do a variety of encoding...
1. Mostly 720, some 1080 videos.
2. I've never formally timed it, but I estimate that 5 minute video on my 11" MBA takes about 2 minutes or so.
3. I use iMovie.
I use various effects that sometimes require multiple passes, such as composite green-screening and such.
Respectfully, I think you might be overthinking this.
The current Macbook Airs are roughly the same (processing-wise) as the low-end iMacs. I see only a slight difference in processing video on my 11" MBA as compared to my 21" iMac. The iMac is faster, which I attribute to the 8GB of RAM rather than the 4GB in the MBA. (that shouldn't be an issue now, because all new MBAs come with 8GB RAM)
Many of us Apple customers are susceptible to doubt, uncertainty, and fear when it comes to Apple products. Myself included! We don't want to "miss out" on something by not getting the next tier storage capacity, or AppleCare, or a full case/cover, etc.
Every macOS device that Apple currently sells is very capable for performing "non-professional" tasks. Just because Apple sells a faster, more capable device (Macbook Pro) doesn't render the MBA useless. It's the difference between viewing things as "good and better" vs. "bad and good".
Having said that, if you really are that concerned about the performance and capabilities of the Macbook Air for your needs, then don't buy one. Kick in the extra and buy a Macbook Pro. Because if a person has lingering doubts and concerns, they will never be content, and wonder about "the path not chosen".