### Is your feature request related to a problem? Please describe.

I have to deal with files that have as many as 50+ alphas.  I need to extract all of them as PNGs, but IM stops at 19.  Is it possible to raise this limit in ImageMagick? The limit in Photoshop is 53 it seems (thought it was 55 but just tested).  You guys work so hard and always have so many requests, I am sorry to bother you with this one, but dang it my work is requiring I find a solution.  Much gratitude and respect to the team, regardless!  : )

- J

### Describe the solution you'd like

Raise the limit of channel extraction to 53

### Describe alternatives you've considered

I think there are none but trying to use a different tool

### Additional context

`magick -define psd:alpha-unblend=off tiny_test.psd -set colorspace Gray -strip -separate channel_%d.png`
[tiny_test.psd.zip](https://github.com/ImageMagick/ImageMagick/files/11711258/tiny_test.psd.zip)

Permit more than 18 channels to be extracted
This is a GitHub Issue
repo:ImageMagick
owner:ImageMagick
Title : Permit more than 18 channels to be extracted
Issue date:

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### Is your feature request related to a problem? Please describe.

I have to deal with files that have as many as 50+ alphas.  I need to extract all of them as PNGs, but IM stops at 19.  Is it possible to raise this limit in ImageMagick? The limit in Photoshop is 53 it seems (thought it was 55 but just tested).  You guys work so hard and always have so many requests, I am sorry to bother you with this one, but dang it my work is requiring I find a solution.  Much gratitude and respect to the team, regardless!  : )

- J

### Describe the solution you'd like

Raise the limit of channel extraction to 53

### Describe alternatives you've considered

I think there are none but trying to use a different tool

### Additional context

`magick -define psd:alpha-unblend=off tiny_test.psd -set colorspace Gray -strip -separate channel_%d.png`
[tiny_test.psd.zip](https://github.com/ImageMagick/ImageMagick/files/11711258/tiny_test.psd.zip)

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