In this collection of images from King Gizzard's instagram, you can see Stu attending to his keyboard stack with an SK-5 on the second level of the keyboard stand.

Sean from Autechre said in an interview with Sound on Sound, "the first stuff we had was a [Roland TR] 606, a [Casio] SK1 and SK5..."

Nick posted a video on Instagram playing a Roland System-1 synthesizer along with a Casio SK-5 on 6/22/2021.

the sk-5 is shown in ambrose’s space at 0:08

Featured in this June 14, 2021 Amoeba “What’s In My Bag [Home Edition]” interview.

I actually got really obsessed with this keyboards. They’re called, like, sample keyboards. You can literally sing in the on-board mic. [records sample of himself singing a note] Now, you can like, play that sample. [plays sample on keyboard] And this is, like, the sound of Sigur Rós that they used a lot on the untitled album [shows his copy of ( )].

In the YouTube video "Glass Animals - Gooey, Your Love (Déjà Vu) & Heat Waves (Stripped Back) | FIFA 21 World Premiere" at 0:17 seconds, you can see the Casio SK-5 vintage sampler keyboard in the background.

In a live performance video of "Asunder, Sweet And Other Distress," David Bryant of Godspeed You! Black Emperor is seen using the Casio SK-5 keyboard.

At 3:11, Laurent is playing the Casio SK-5 with another keyboard. He remarks how he played both Keyboards at the same time as a joke and it inspired him to write something similar in Lisztomania.

The Sk-5 can be seen at 3:59 in the "3 Feet High and Rising" press kit video. Prince Paul also mentions using it with De La Soul in this interview: https://medium.com/micro-chop/make-those-records-you-make-prince-paul-reacalls-the-making-of-de-la-soul-is-dead-d72af2ddeaf6 From that interview:

Gino: I’m amazed that you guys were utilizing an SK-5. I know that’s a very limited sampler. Did you just use the external mic device to sample?

Prince Paul: I honestly don’t remember. I still have that sampler, but it’s in my attic. I think there was a mic input and it also had mic built in on top of it that you could speak into. I think we just plugged into the mic input and sped samples up. Obviously the sound was kind of jacked up, but nobody was concerned about quality back then. We were just impressed by the novelty of sampling. Everyone was like, “Ooh, I can take a piece of something and play it on a keyboard.”

in this X/twitter post by merge records you can see this keyboard which was used on mikes album I hate jazz

Hot Sugar is shown using a Casio SK-5 in a photo posted on their official Facebook page.

In an interview on the making of "De La Soul is Dead", Prince Paul comments on the equipment used for the album:

"Gino: I know in talking to you for an earlier interview that you guys were using an Akai S-900, an Emu SP-12, and a Casio SK-5 on 3 Feet High and Rising. Did you use the same equipment for De La Soul is Dead?

Prince Paul: Yeah, we used all of the same stuff. We were at the same studio, Calliope. I think we mixed the album at Island Media in New York. We basically used the same format.

...

Gino: I’m amazed that you guys were utilizing an SK-5. I know that’s a very limited sampler. Did you just use the external mic device to sample?

Prince Paul: I honestly don’t remember. I still have that sampler, but it’s in my attic. I think there was a mic input and it also had mic built in on top of it that you could speak into. I think we just plugged into the mic input and sped samples up. Obviously the sound was kind of jacked up, but nobody was concerned about quality back then. We were just impressed by the novelty of sampling. Everyone was like, 'Ooh, I can take a piece of something and play it on a keyboard.'"