Upgrade 2.3.5 to 2.4.3-p1 fails

[silas3]

I'm getting:

- magento/product-community-edition 2.4.3-p1 requires magento/framework 103.0.3-p1 -> satisfiable by magento/framework[103.0.3-p1]

I've tried the hack here: https://github.com/magento/magento2/issues/29350 but whatever I do I seem to remain in dependency hell.

Is there any reason not to take a clean 2.4.3 composer.json from a new install and just run composer update with that? - ignoring 3rd party plugins - I can require them later.

[LitExtension Expert]

I suggest you try

"require": {
        "magento/product-community-edition": "2.4.3-p1",
        "magento/composer-root-update-plugin": "~1.1",
        "magento/composer-dependency-version-audit-plugin": "~0.1"
    },
"require-dev": {
        "allure-framework/allure-phpunit": "~1.4",
        "dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
        "friendsofphp/php-cs-fixer": "~2.18.1",
        "lusitanian/oauth": "~0.8.10",
        "magento/magento-coding-standard": "*",
        "magento/magento2-functional-testing-framework": "^3.0",
        "pdepend/pdepend": "~2.7.1",
        "phpcompatibility/php-compatibility": "^9.3",
        "phpmd/phpmd": "^2.8.0",
        "phpstan/phpstan": "^0.12.77",
        "phpunit/phpunit": "^9",
        "sebastian/phpcpd": "^6.0.3",
        "squizlabs/php_codesniffer": "~3.5.4",
        "symfony/finder": "^5.2"
    }