why is all data stored in binary form
This will not answer your question fully. is declared? From,
The Blob() constructor can be invoked with zero or more parameters. When the Blob() constructor is invoked, user agents must run the following Blob constructor steps:  If invoked with zero parameters, return a new Blob object with its readability state set to OPENED, consisting of 0 bytes, with size set to 0, and with type set to the empty string.  Otherwise, the constructor is invoked with a blobParts sequence. Let a be that sequence.  Let bytes be an empty sequence of bytes.  Let length be `a`s length. For 0 Б i length, repeat the following steps: 1. Let element be the ith element of a. 2. If element is a DOMString, run the following substeps: Let s be the result of converting element to a sequence of Unicode characters [Unicode] using the algorithm for doing so in WebIDL. Encode s as UTF-8 and append the resulting bytes to bytes. Note: The algorithm from WebIDL [WebIDL] replaces unmatched surrogates in an invalid UTF-16 string with U+FFFD replacement characters. Scenarios exist when the Blob constructor may result in some data loss due to lost or scrambled character sequences. 3. If element is an ArrayBufferView [TypedArrays], convert it to a sequence of byteLength bytes from the underlying ArrayBuffer, starting at the byteOffset of the ArrayBufferView [TypedArrays], and append those bytes to bytes. 4.
If element is an ArrayBuffer [TypedArrays], convert it to a sequence of byteLength bytes, and append those bytes to bytes. 5. If element is a Blob, append the bytes it represents to bytes. The type of the Blob array element is ignored.  If the type member of the optional options argument is provided and is not the empty string, run the following sub-steps: 1. Let t be the type dictionary member. If t contains any characters outside the range U+0020 to U+007E, then set t to the empty string and return from these substeps. 2. Convert every character in t to lowercase using the "converting a string to ASCII lowercase" algorithm.  Return a Blob object with its readability state set to OPENED, referring to bytes as its associated byte sequence, with its size set to the length of bytes, and its type set to the value of t from the substeps above. It's stored in the ram, just like the other objects declared in the window. , we can see how its physically stored in the ram. Here is an example blob. c7828dad-dd4f-44e6-b374-9239dbe35e35 Refcount: 1 Status: BlobStatus::DONE: Blob built with no errors.
Encoding formats have been standardised to help compatibility across different platforms. For example: audio is encoded as audio file formats, eg mp3, WAV, AAC video is encoded as video file formats, eg MPEG4, H264 text is encoded in character sets, eg ASCII, Unicode images are encoded as file formats, eg BMP, JPEG, PNG The more bits used in a pattern, the more combinations of values become available. This larger number of combinations can be used to represent many more things, eg a greater number of different symbols, or more colours in a picture. Did you know? In the early days of computing, the only way to enter data into a computer was by flicking switches or by feeding in punched cards or punched paper tape. Since computers work using binary, with data represented as 1s and 0s, both switches and punched holes were easily able to reflect these two states - on to represent 1 and off to represent 0; a hole to represent 1 and no hole to represent 0. (used during the Second World War) were operated using punched cards and tapes. Modern computers still read data in binary form but it is much faster and more convenient to read this from microchips or from magnetic or optical disks.
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