Without Flash the current web tech stack might look different(trzeci.eu)

    3.3.2 An Application may not itself install or launch other executable code
    by any means, including without limitation through the use of a plug-in
    architecture, calling other frameworks, other APIs or otherwise.
    No interpreted code may be downloaded and used in an Application except for
    code that is interpreted and run by Apple's Published APIs and built-in
    interpreter(s).

    3.3.2 An Application may not itself install or launch other executable code
    by any means, including without limitation through the use of a plug-in
    architecture, calling other frameworks, other APIs or otherwise.
    No interpreted code may be downloaded or used in an Application except for
    code that is interpreted and run by Apple's Documented APIs and built-in
    interpreter(s).

    3.3.2 An Application may not itself install or launch other executable code
    by any means, including without limitation through the use of a plug-in
    architecture, calling other frameworks, other APIs or otherwise.
    Unless otherwise approved by Apple in writing, no interpreted code may be
    downloaded or used in an Application except for code that is interpreted
    and run by Apple's Documented APIs and built-in interpreter(s).
    Notwithstanding the foregoing, with Apple’s prior written consent, an
    Application may use embedded interpreted code in a limited way if such use
    is solely for providing minor features or functionality that are consistent
    with the intended and advertised purpose of the Application.

    3.3.2 An Application may not download or install executable code.
    Interpreted code may only be used in an Application if all scripts, code
    and interpreters are packaged in the Application and not downloaded. The
    only exception to the foregoing is scripts and code downloaded and run by
    Apple's built-in WebKit framework.

    3.3.2 Except as set forth in the next paragraph, an Application may not
    download or install executable code. Interpreted code may be downloaded to
    an Application but only so long as such code: (a) does not change the
    primary purpose of the Application by providing features or functionality
    that are inconsistent with the intended and advertised purpose of the
    Application as submitted to the App Store, (b) does not create a store or
    storefront for other code or applications, and (c) does not bypass signing,
    sandbox, or other security features of the OS.
    An Application that is a programming environment intended for use in
    learning how to program may download and run executable code so long as the
    following requirements are met: (i) no more than 80 percent of the
    Application’s viewing area or screen may be taken over with executable code,
    except as otherwise permitted in the Documentation, (ii) the Application
    must present a reasonably conspicuous indicator to the user within the
    Application to indicate that the user is in a programming environment, (iii)
    the Application must not create a store or storefront for other code or
    applications, and (iv) the source code provided by the Application must be
    completely viewable and editable by the user (e.g., no pre-compiled
    libraries or frameworks may be included with the code downloaded).