Readjust four column values by ignoring blank cells (Google Sheets)

Question

I have this values:

And I would like the formula to ignore blank cells, with the final result in the following sequence:

I tried t

Answer 1

How about this modified formula?

Modified formula:

=ARRAYFORMULA(TRIM(SPLIT(TRANSPOSE(SPLIT(REGEXREPLACE(TEXTJOIN(",",TRUE,A1:D),"(([\w\s]+,){3}[\w\s]+)","$1@"),"@")),",")))

• The flow of this formula is as follows.
  1. Join all cell values by ignoring the empty cells using TEXTJOIN.
  2. Put @ to the joined text value for 4 columns using REGEXREPLACE.
  3. Split the text value with @ using SPLIT.
  4. Transpose the splitted values using TRANSPOSE.
  5. Split the each row with , using SPLIT.

Result:

Note:

• If , and @ are included in the cell values, please change them in the formula.

References:

• TEXTJOIN
• REGEXREPLACE
• SPLIT
• TRANSPOSE

Added 1:

About I guess this will fail, if cell values are more than 1 character. of TheMaster's comment, I tested it as follows.

Added 2:

For OP's new situation, I added the below modified formula. In this case, the regex is modified.

Modified formula:

=ARRAYFORMULA(TRIM(SPLIT(TRANSPOSE(SPLIT(REGEXREPLACE(TEXTJOIN(",",TRUE,A1:D),"(([\w\s\S]+?,){4})","$1@"),"@")),",")))

Result: