These templates from Litmus are great but im wondering why on all of them the MSO Conditional is commented out - i thought this was accomodate Outlooks refusal to handle specified widths...but why are all of them commented out??

<table border="0" cellpadding="0" cellspacing="0" width="100%">
    <tr>
        <td align="center" valign="top" width="100%" background="images/bg.jpg" bgcolor="#3b4a69" style="background: #3b4a69 url('images/bg.jpg'); background-size: cover; padding: 50px 15px 0 15px;" class="mobile-padding">
            <!--[if (gte mso 9)|(IE)]>
            <table align="center" border="0" cellspacing="0" cellpadding="0" width="600">
            <tr>
            <td align="center" valign="top" width="600">
            <![endif]-->
            <table align="center" border="0" cellpadding="0" cellspacing="0" width="100%" style="max-width:600px;">
                <tr>
                    <td align="center" valign="top" style="padding: 0 0 20px 0;">
                        <img src="images/litmus-wheel-white.png" width="50" height="50" border="0" style="display: block;">
                    </td>
                </tr>